diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
new file mode 100644
index 00000000..57178b39
--- /dev/null
+++ b/.github/workflows/CI.yml
@@ -0,0 +1,60 @@
+name: SQLite FDW test
+
+on:
+  workflow_dispatch:
+  pull_request:  
+  push:
+    branches:
+      - master
+      - main
+jobs:
+  detect-pgversion:
+    runs-on: ubuntu-22.04
+    outputs:
+      pgversion: ${{ steps.detect-pgversion.outputs.targets }}
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: detect-pgversion
+        id: detect-pgversion
+        run: |
+          targets=`bash GitHubActions/detect_targets.sh`
+          echo "targets=$targets" >> $GITHUB_OUTPUT
+
+  test:
+    needs: detect-pgversion
+    env:
+      SQLITE_VERSION : "3420000"
+      SQLITE_YEAR: "2023"
+      HTTP_PROXY: ""
+      HTTPS_PROXY: ""
+    strategy:
+      fail-fast: false
+      matrix:
+        pg: ${{ fromJSON(needs.detect-pgversion.outputs.pgversion) }}
+        
+    name: Test on PostgreSQL ${{ matrix.pg }}
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: tar
+        run: tar zcvf sqlite_fdw.tar.gz ./*
+      
+      - name: set_proxy
+        run: bash GitHubActions/env.sh
+
+      - name: install locales
+        run: bash GitHubActions/install_locales.sh
+            
+      - name: build PostgreSQL ${{ matrix.pg }}
+        run: bash GitHubActions/build_postgres.sh ${{ matrix.pg }}
+
+      - name: install SQLite
+        run: bash GitHubActions/install_sqlite.sh ${{ env.SQLITE_VERSION }} ${{ env.SQLITE_YEAR }}
+      
+      - name: build sqlite_fdw
+        run: bash GitHubActions/build_sqlite_fdw.sh ${{ matrix.pg }}
+      
+      - name: execute sqlite_fdw test
+        run: bash GitHubActions/execute_test.sh ${{ matrix.pg }} 
diff --git a/GitHubActions/README.md b/GitHubActions/README.md
new file mode 100644
index 00000000..a4a884d9
--- /dev/null
+++ b/GitHubActions/README.md
@@ -0,0 +1,10 @@
+# CI environment of sqlite_fdw.
+
+Tests will be executed automatically when commited to main/master branch and when a pull request was opened/updated.
+It is realized by using GitHub actions.
+
+The CI process is defined in .github/workflows/CI.yml file.
+Scripts in this directory (GitHubActions/*.sh) are referred by CI.yml. 
+
+The regression test will be executed for multi-versions of PostgreSQL.
+Target versions are determined automatically based on directory names in "sql" directory.
diff --git a/GitHubActions/build_postgres.sh b/GitHubActions/build_postgres.sh
new file mode 100644
index 00000000..bb2fbd22
--- /dev/null
+++ b/GitHubActions/build_postgres.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+################################################################################
+#
+# This script downloads PostgreSQL from the official web site into ./workdir
+# then builds it.
+#
+# Usage: ./build_postgres.sh pg_version
+#     pg_version is a PostgreSQL version to be installed like 16.0.
+#
+# Requirements
+# - be able to connect to the PostgreSQL official web site by curl.
+#
+################################################################################
+
+VERSION=$1
+mkdir -p ./workdir
+cd ./workdir
+curl -O https://ftp.postgresql.org/pub/source/v${VERSION}/postgresql-${VERSION}.tar.bz2
+tar xjf postgresql-${VERSION}.tar.bz2
+cd postgresql-${VERSION}
+./configure
+make
diff --git a/GitHubActions/build_sqlite_fdw.sh b/GitHubActions/build_sqlite_fdw.sh
new file mode 100644
index 00000000..f60012e4
--- /dev/null
+++ b/GitHubActions/build_sqlite_fdw.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+################################################################################
+#
+# This script builds sqlite_fdw in PostgreSQL source tree.
+#
+# Usage: ./build_sqlite_fdw.sh pg_version
+#     pg_version is a PostgreSQL version like 16.0 to be built in.
+#
+# Requirements
+# - the source code of sqlite_fdw is available by git clone.
+# - the source code of PostgreSQL is located in ~/workdir/postgresql-{pg_version}.
+# - SQLite development package is installed in a system.
+################################################################################
+
+VERSION=$1
+mkdir -p ./workdir/postgresql-${VERSION}/contrib/sqlite_fdw
+tar zxvf ./sqlite_fdw.tar.gz -C ./workdir/postgresql-${VERSION}/contrib/sqlite_fdw/
+cd ./workdir/postgresql-${VERSION}/contrib/sqlite_fdw
+export LD_LIBRARY_PATH=/usr/local/lib/:$LD_LIBRARY_PATH
+make
diff --git a/GitHubActions/detect_targets.sh b/GitHubActions/detect_targets.sh
new file mode 100644
index 00000000..5ba069e9
--- /dev/null
+++ b/GitHubActions/detect_targets.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+################################################################################
+#
+# This script detects target PostgreSQL versions for sqlite_fdw testing from 
+# directory names in ./sql directory. Detected versions will be outputed to
+# the standard output as an array of string like ["15.4","16.0"].
+#
+# Usage: ./detect_targets.sh
+#
+# Requirements
+# - there is a directory named "sql" in a curent directory.
+#
+################################################################################
+
+dirs="./sql/*"
+pattern="[0-9]+\.[0-9]+"
+targets="["
+for pathname in $dirs; do
+	if [[ "$pathname" =~ $pattern ]]; then
+		target=`basename $pathname`
+		if [ "$targets" != "[" ]; then
+			targets+=","
+		fi
+		targets+="\"$target\""
+	fi
+done
+targets+="]"
+
+echo "$targets"
diff --git a/GitHubActions/env.sh b/GitHubActions/env.sh
new file mode 100644
index 00000000..f6073765
--- /dev/null
+++ b/GitHubActions/env.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+################################################################################
+#
+# This script configures apt.conf to set a proxy if an environment variable
+# HTTP_PROXY or HTTPS_PROXY is set.
+#
+# Usage: ./env.sh
+#
+# Requirements
+# - having superuser privileges
+#
+################################################################################
+
+if [ -z $HTTP_PROXY ] && [ "$HTTP_PROXY" != "" ]; then
+	echo 'Acquire::http::proxy "$HTTP_PROXY";' | sudo tee /etc/apt/apt.conf
+fi
+if [ -z $HTTPS_PROXY ] && [ "$HTTPS_PROXY" != "" ]; then
+	echo 'Acquire::https::proxy "$HTTPS_PROXY";' | sudo tee -a /etc/apt/apt.conf
+fi
diff --git a/GitHubActions/execute_test.sh b/GitHubActions/execute_test.sh
new file mode 100644
index 00000000..e67f3360
--- /dev/null
+++ b/GitHubActions/execute_test.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+
+################################################################################
+#
+# This script executes a regression test pf sqlite_fdw by calling test.sh in
+# sqlite_fdw. If all tests are passed, this script will exit successfully.
+# Otherwise, it will exit with failure.
+
+# Usage: ./execute_test.sh pg_version
+#     pg_version is a PostgreSQL version to be tested like 16.0.
+#
+# Requiremets
+# - the source code of PostgreSQL is located in ./workdir/postgresql-{pg_version}.
+# - the source code of sqlite_fdw is loacted in ./workdir/postgresql-{pg_version}/contrib/sqlite_fdw.
+# - PostgreSQL and sqlite_fdw were built.
+# - this script assumes that tests are passed if this file (created by executing
+#   the test) contains " ALL {number} tests passed" at the last or the 3rd line
+#   from the end.
+#
+################################################################################
+
+VERSION=$1
+cd ./workdir/postgresql-${VERSION}/contrib/sqlite_fdw
+chmod +x ./test.sh
+./test.sh
+
+last_line=$(tail -n 1 make_check.out)
+third_line_from_the_last=$(tail -n 3 make_check.out | head -n 1)
+
+pattern=" All [0-9]+ tests passed.+"
+
+if [[ "$last_line" =~ $pattern ]]; then
+	echo "last_line"
+
+elif [[ "$third_line_from_the_last" =~ $pattern ]]; then
+	 echo "$third_line_from_the_last"
+else
+	echo "Error : not All the tests passed"
+	echo "last line : '$last_line'"
+	echo "thierd_line_from_the_last : '$third_line_from_the_last'"
+	exit 1
+fi
diff --git a/GitHubActions/install_locales.sh b/GitHubActions/install_locales.sh
new file mode 100644
index 00000000..a120cfe3
--- /dev/null
+++ b/GitHubActions/install_locales.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+################################################################################
+#
+# This script installs some locales and language packs used by sqlite_fdw
+# tests in Ubuntu.
+#
+# Usage: ./install_locales.sh
+# 
+# Requirements:
+# - having superuser privileges
+#
+################################################################################
+
+sudo apt-get update
+sudo apt-get install locales language-pack-ja
+sudo locale-gen ja_JP.EUC-JP
+sudo apt-get install language-pack-ko-base language-pack-ko
+sudo locale-gen ko_KR.EUC-KR
+sudo apt -get install language-pack-bg-base language-pack-bg
+sudo locale-gen bg_BG
diff --git a/GitHubActions/install_sqlite.sh b/GitHubActions/install_sqlite.sh
new file mode 100644
index 00000000..0b6fcb84
--- /dev/null
+++ b/GitHubActions/install_sqlite.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+################################################################################
+#
+# This sript downloads SQLite source code from the official web site into
+# ./workdir then builds and installs it.
+#
+# Usage: ./install_sqlite.sh version year
+#     version: SQLite version to be installed
+#     year: A year of SQLite released. It is used for determining a download URL.
+#
+#     Ex) ./install_sqlite.sh 3420000 2023
+#
+# Requirements
+# - be able to connect to the SQLite official web site by curl.
+# - having superuser privileges
+#
+################################################################################
+
+VERSION=$1
+YEAR=$2
+mkdir -p ./workdir
+cd ./workdir
+curl -O https://www.sqlite.org/${YEAR}/sqlite-src-${VERSION}.zip
+unzip sqlite-src-${VERSION}.zip
+cd sqlite-src-${VERSION}
+./configure --enable-fts5
+make
+sudo make install