diff --git a/script/ubuntu-kaiten-yaki.sh b/script/ubuntu-kaiten-yaki.sh
index 5d09f57..ba2ec59 100644
--- a/script/ubuntu-kaiten-yaki.sh
+++ b/script/ubuntu-kaiten-yaki.sh
@@ -342,9 +342,12 @@ echo "...Upadte initramfs."
 update-initramfs -uk all
 
 # Leave chroot
-exit
 HEREDOC
 
+# Unmount all
+echo "...Unmount all."
+umount -R /mnt/target
+
 # Finishing message
 cat <<HEREDOC
 ****************** Post-install process finished ******************