diff --git a/README.mdown b/README.mdown
index c2fd1f7..e44be33 100644
--- a/README.mdown
+++ b/README.mdown
@@ -50,6 +50,17 @@ If you prefer a manual installation, please use the following instructions:
 
     $ git clone --recursive git://github.com/iwata/git-now.git
 
+#### for Windows
+Then, you can install `git-now`, using:
+
+    > .\contrib\msysgit-install.bat
+
+By default, git-now will be installed in %HOME%, If %HOME% is not defined be installed in %UserProfile%\bin.
+
+
+*note : shFlags needs "getopt.exe" or others, Reffer to [gitflow installation document] (https://github.com/nvie/gitflow/wiki/Windows).*
+
+#### for Others
 Then, you can install `git-now`, using:
 
     $ sudo make install
diff --git a/contrib/exclude.txt b/contrib/exclude.txt
new file mode 100644
index 0000000..7c15bf0
--- /dev/null
+++ b/contrib/exclude.txt
@@ -0,0 +1,4 @@
+.gitmodules
+Makefile
+README.mdown
+gitnow-shFlags
diff --git a/contrib/msysgit-install.cmd b/contrib/msysgit-install.cmd
new file mode 100644
index 0000000..77d958b
--- /dev/null
+++ b/contrib/msysgit-install.cmd
@@ -0,0 +1,23 @@
+set STARTUP_PATH=%~d0%~p0
+if "%HOME%" == "" goto sethome
+goto makedir
+
+:sethome
+echo set HOME variable
+set HOME=%UserProfile%
+
+:makedir
+if not exist %HOME%\bin goto :copyshflags
+echo make bin folder
+mkdir %HOME%\bin
+
+set MSYS_BIN=%HOME%\bin
+
+echo Installing git-now to "%MSYS_BIN%"
+
+:copyshflags
+echo copy shFlags
+copy %STARTUP_PATH%..\shFlags\src\shflags %MSYS_BIN%\gitnow-shFlags
+
+:copygitnow
+xcopy /EXCLUDE:%STARTUP_PATH%exclude.txt /D /Y %STARTUP_PATH%..\* %MSYS_BIN%
diff --git a/git-now b/git-now
index 2b346fe..4e3efe5 100755
--- a/git-now
+++ b/git-now
@@ -5,7 +5,10 @@ if [ "$DEBUG" = "yes" ]; then
   set -x
 fi
 
-export GITNOW_DIR=$(dirname "$0")
+GITNOW_DIR=$0
+GITNOW_DIR=${GITNOW_DIR%\\*} # for msysGit
+GITNOW_DIR=${GITNOW_DIR%/*}  # for others
+export GITNOW_DIR
 PREFIX="from now"
 
 usage() {