diff --git a/README.rst b/README.rst
index a1006ad..de150e0 100644
--- a/README.rst
+++ b/README.rst
@@ -83,12 +83,12 @@ Providers
 TODO list.
 
 - [ ] base
-- [X] faker.provider.address
+- [o] faker.provider.address
 - [ ] faker.provider.automotive
-- [ ] faker.provider.bank
+- [o] faker.provider.bank
 - [ ] faker.provider.barcode
 - [ ] faker.provider.color
-- [X] faker.provider.company
+- [o] faker.provider.company
 - [ ] faker.provider.credit_card
 - [ ] faker.provider.currency
 - [ ] faker.provider.date_time
@@ -96,15 +96,15 @@ TODO list.
 - [ ] faker.provider.geo
 - [ ] faker.provider.internet
 - [ ] faker.provider.isbn
-- [X] faker.provider.job
+- [o] faker.provider.job
 - [ ] faker.provider.lorem
 - [ ] faker.provider.misc
-- [X] faker.provider.person
-- [X] faker.provider.phone_number
+- [o] faker.provider.person
+- [o] faker.provider.phone_number
 - [ ] faker.provider.profile
 - [ ] faker.provider.python
 - [ ] faker.provider.ssn
-- [X] faker.provider.user_agent
+- [o] faker.provider.user_agent
 
 ************
 API document
diff --git a/faker.nimble b/faker.nimble
index 0542814..e6ed512 100644
--- a/faker.nimble
+++ b/faker.nimble
@@ -10,6 +10,7 @@ bin           = @["faker/cli/faker"]
 binDir        = "bin"
 
 from os import `/`, splitFile
+from algorithm import sort
 import strformat, strutils, sequtils
 
 # Dependencies
@@ -19,6 +20,13 @@ requires "nim >= 1.0.0"
 let
   providerDir = "src" / "faker" / "provider"
 
+proc addGeneratedText(lines: var seq[string]) =
+  lines.add("# ----------------------------------------------- #")
+  lines.add("# This module was generated by 'nimble genProvs'. #")
+  lines.add("# See 'faker.nimble'.                             #")
+  lines.add("# ----------------------------------------------- #")
+  lines.add("")
+
 task docs, "Generate API documents":
   exec "nimble doc --index:on --project --out:docs --hints:off src/faker.nim"
 
@@ -56,19 +64,17 @@ task genMod, "Generate module":
     echo "Generated: " & newPath
 
 task genProvs, "Generate provider file":
+  var providers: seq[string]
   for dir in listDirs(providerDir):
     let dstFile = dir & ".nim"
     var lines: seq[string]
-    lines.add("# ----------------------------------------------- #")
-    lines.add("# This module was generated by 'nimble genProvs'. #")
-    lines.add("# See 'faker.nimble'.                             #")
-    lines.add("# ----------------------------------------------- #")
-    lines.add("")
+    lines.addGeneratedText()
     lines.add("import util")
     lines.add("import ../base")
 
     # Get submodule names
     let (_, prefix, _) = splitFile(dir)
+    providers.add(prefix)
     var modules: seq[string]
     var locales: seq[string] # en_US, ja_JP
     for file in listFiles(dir):
@@ -103,3 +109,13 @@ task genProvs, "Generate provider file":
     let body = lines.join("\n")
     writeFile(dir & ".nim", body)
 
+  providers.sort()
+
+  # generate provider.nim
+  var lines: seq[string]
+  let prov = providers.join(", ")
+  lines.addGeneratedText()
+  lines.add(&"import provider/[{prov}]")
+  lines.add(&"export {prov}")
+  let body = lines.join("\n")
+  writeFile(providerDir & ".nim", body)
diff --git a/src/faker/provider.nim b/src/faker/provider.nim
index 4f31505..2075aee 100644
--- a/src/faker/provider.nim
+++ b/src/faker/provider.nim
@@ -1,2 +1,7 @@
-import provider/[address, phone_number, job, person, company, user_agent]
-export address, phone_number, job, person, company, user_agent
+# ----------------------------------------------- #
+# This module was generated by 'nimble genProvs'. #
+# See 'faker.nimble'.                             #
+# ----------------------------------------------- #
+
+import provider/[address, bank, company, job, person, phone_number, user_agent]
+export address, bank, company, job, person, phone_number, user_agent
\ No newline at end of file
diff --git a/src/faker/provider/bank.nim b/src/faker/provider/bank.nim
new file mode 100644
index 0000000..e2ba708
--- /dev/null
+++ b/src/faker/provider/bank.nim
@@ -0,0 +1,18 @@
+# ----------------------------------------------- #
+# This module was generated by 'nimble genProvs'. #
+# See 'faker.nimble'.                             #
+# ----------------------------------------------- #
+
+import util
+import ../base
+import bank/[bank_en_US]
+export base
+
+genProc bank,
+  [
+    bankCountry,
+    bban,
+    iban,
+  ], [
+    en_US,
+  ]
\ No newline at end of file
diff --git a/src/faker/provider/bank/bank_en_US.nim b/src/faker/provider/bank/bank_en_US.nim
new file mode 100644
index 0000000..7fdd372
--- /dev/null
+++ b/src/faker/provider/bank/bank_en_US.nim
@@ -0,0 +1,33 @@
+include interfaces
+
+import tables
+from strutils import join, parseBiggestUInt
+from strformat import `&`
+from sequtils import mapIt
+
+const
+  countryCode = "GB"
+  bbanFormat = "#############"
+  asciiUpperCase = {'A'..'Z'}
+
+let
+  alpha = block:
+    var tbl = initTable[char, string]()
+    for ch in asciiUpperCase:
+      tbl.add(ch, $(ch.ord mod 55))
+    tbl
+
+proc bankCountry*(f: Faker): string =
+  countryCode
+
+proc bban*(f: Faker): string =
+  var r = f.rand
+  for i in 0..3:
+    result.add(r.sample(asciiUpperCase))
+  result.add(r.formatNumbers(bbanFormat))
+
+proc iban*(f: Faker): string =
+  let bban = f.bban()
+  let checkInt = 98 - (f.rand.rand(1..100) mod 97)
+  let check = &"{checkInt:>02}"
+  result = countryCode & check & bban
diff --git a/src/faker/provider/bank/interfaces.nim b/src/faker/provider/bank/interfaces.nim
new file mode 100644
index 0000000..993bbf9
--- /dev/null
+++ b/src/faker/provider/bank/interfaces.nim
@@ -0,0 +1,14 @@
+# interfaces はプロシージャの定義のみをまとめたモジュール。
+# C言語でいうヘッダファイルのように使用する。
+#
+# このモジュールをincludeしたモジュールは、このモジュールに定義しているプロシー
+# ジャを全て実装しないと、コンパイルが通らない。
+
+import random
+import ../../base
+import ../util
+export base
+
+proc bankCountry*(f: Faker): string
+proc bban*(f: Faker): string
+proc iban*(f: Faker): string
diff --git a/tests/test1.nim b/tests/test1.nim
index c635bc7..2bb87d0 100644
--- a/tests/test1.nim
+++ b/tests/test1.nim
@@ -24,4 +24,7 @@ suite "basic usage":
         echo fake.opera()
         echo fake.safari()
         echo fake.internetExplorer()
+        echo fake.bankCountry()
+        echo fake.bban()
+        echo fake.iban()
         echo "-----"