diff --git a/sakura_core/String_define.h b/sakura_core/String_define.h
index 2b6f37807e..41db36f1d8 100644
--- a/sakura_core/String_define.h
+++ b/sakura_core/String_define.h
@@ -1385,5 +1385,6 @@
 #define STR_KEYHELP_RMENU_NONE			35029
 #define STR_KEYHELP_RMENU_TOP			35030
 #define STR_KEYHELP_RMENU_BOTTOM		35031
+#define STR_ERR_FILEPATH_TOO_LONG		35034
 
-// Now using max number 35033 by STR_LOADAGENT_BIG_ERROR
+// Now using max number 35034 by STR_ERR_FILEPATH_TOO_LONG
diff --git a/sakura_core/cmd/CViewCommander_File.cpp b/sakura_core/cmd/CViewCommander_File.cpp
index b983bdee21..afe0afa6a5 100644
--- a/sakura_core/cmd/CViewCommander_File.cpp
+++ b/sakura_core/cmd/CViewCommander_File.cpp
@@ -136,6 +136,16 @@ void CViewCommander::Command_FILEOPEN( const WCHAR* filename, ECodeType nCharCod
 		);
 		if(!bDlgResult)return;
 
+		for(size_t i = 0; i < files.size(); i++ ){
+			if (files[i].length() >= _MAX_PATH){
+				ErrorMessage(
+					CEditWnd::getInstance()->GetHwnd(),
+					LS(STR_ERR_FILEPATH_TOO_LONG),
+					files[i].c_str()
+				);
+				return;
+			}
+		}
 		sLoadInfo.cFilePath = files[0].c_str();
 		// 他のファイルは新規ウィンドウ
 		int nSize = (int)files.size();
diff --git a/sakura_core/sakura_rc.rc b/sakura_core/sakura_rc.rc
index 54199d9b18..96070a9670 100644
--- a/sakura_core/sakura_rc.rc
+++ b/sakura_core/sakura_rc.rc
@@ -4121,6 +4121,8 @@ GDI リソース\t残り  %d%%\n\n"
 	STR_FILETREE_REPLACE_PATH_FROM	"置換元パスを指定してください"
 	STR_FILETREE_REPLACE_PATH_TO	"置換先文字列を指定してください"
 
+	STR_ERR_FILEPATH_TOO_LONG		"%ls\nというファイルを開けません。\nファイルのパスが長すぎます。"
+
 END
 
 STRINGTABLE DISCARDABLE 
diff --git a/sakura_lang_en_US/sakura_lang_rc.rc b/sakura_lang_en_US/sakura_lang_rc.rc
index 19bfe58704..5ab2657a19 100644
--- a/sakura_lang_en_US/sakura_lang_rc.rc
+++ b/sakura_lang_en_US/sakura_lang_rc.rc
@@ -4132,6 +4132,9 @@ GDI Resource\tRemaining  %d%%\n\n"
 	STR_FILETREE_REPLACE_PATH_FROM	"Please Input Replace 'From' Path"
 	STR_FILETREE_REPLACE_PATH_TO	"Please Input Replace 'To' Path"
 
+	STR_ERR_FILEPATH_TOO_LONG		"'%ts'\nCannot open the file.\nThe filepath is too long."
+
+
 END
 
 STRINGTABLE DISCARDABLE