diff --git a/.gitignore b/.gitignore
index 7d99983..e03aa74 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,6 @@
 
 /.vs
 bin
-obj
\ No newline at end of file
+obj
+/_checksum.sha
+launchSettings.json
diff --git a/BuildSum/MainModule.cs b/BuildSum/MainModule.cs
index 912eb2c..1464a54 100644
--- a/BuildSum/MainModule.cs
+++ b/BuildSum/MainModule.cs
@@ -13,6 +13,7 @@ public class MainModule
         public string TargetDir;
         public string CompressDir;
         public List<string> IgnoreFiles = new List<string>();
+        public bool IgnoreHidden = true;
 
         private void Log(LogStatus status, LogCategory category, string filename, string message)
         {
@@ -90,6 +91,10 @@ public MainModule(string[] args)
                             i++;
                             ignorePath = args[i];
                             break;
+                        case "--include-hidden":
+                        case "-h":
+                            IgnoreHidden = false;
+                            break;
                         case "--help":
                         case "/?":
                             ShowUsage();
@@ -152,7 +157,7 @@ public void Run()
             {
                 Error(string.Format("{0}: ディレクトリがありません", TargetDir));
             }
-            FileList list = FileList.CreateByDirectory(TargetDir, IgnoreFiles, CompressDir);
+            FileList list = FileList.CreateByDirectory(TargetDir, IgnoreFiles, IgnoreHidden, CompressDir);
             list.Log += FileList_Log;
             list.SaveChecksum();
             CompressFiles(list);
diff --git a/BuildSum/Resources/Usage.txt b/BuildSum/Resources/Usage.txt
index 439b0c7..cb0cd0b 100644
--- a/BuildSum/Resources/Usage.txt
+++ b/BuildSum/Resources/Usage.txt
@@ -22,6 +22,10 @@ Options:
       �e�v�f�͉��s�ŋ�؂�B���C���h�J�[�h�B
       --ignore�Ɣr���I�Ɏg�p����B
 
+  --include-hidden
+  -h
+      �ꗗ�ɉB���t�@�C�����܂߂�B
+
   --help
   /?
       ���̃w���v��\��
diff --git a/HDistCore/FileList.cs b/HDistCore/FileList.cs
index f66ddcb..4476538 100644
--- a/HDistCore/FileList.cs
+++ b/HDistCore/FileList.cs
@@ -127,7 +127,8 @@ public FileEntry FindEntry(string targetDirectory, string filename)
 
         public void SaveChecksum()
         {
-            SaveToFile(Path.Combine(BaseDirectory, CHECKSUM_FILE));
+            string path = Path.Combine(BaseDirectory, CHECKSUM_FILE);
+            SaveToFile(path);
         }
 
         public void SaveToFile(string filename)
@@ -139,6 +140,8 @@ public void SaveToFile(string filename)
                     writer.WriteLine(entry.GetChecksum(BaseDirectory) + "\t" + entry.FileName);
                 }
             }
+            FileAttributes attr = File.GetAttributes(filename);
+            File.SetAttributes(filename, attr | FileAttributes.Hidden);
         }
         public void SaveToStream(Stream stream)
         {
@@ -337,43 +340,43 @@ internal FileList(string baseDir, string filename)
             }
         }
         
-        private void EnumFiles(string directory, List<Regex> ignoreNames)
+        private bool IsIgnored(string fullPath, string relPath, List<Regex> ignoreNames, bool ignoreHidden)
         {
-            foreach (string s in Directory.EnumerateFiles(directory, "*", SearchOption.TopDirectoryOnly))
+            if (ignoreHidden && (File.GetAttributes(fullPath) & FileAttributes.Hidden) != 0)
             {
-                string path1 = Path.GetRelativePath(BaseDirectory, s);
-                string path2 = Path.GetFileName(s);
-                bool ignore = false;
-                foreach (Regex regex in ignoreNames)
+                return true;
+            }
+            string path1 = Treat(relPath);
+            string path2 = Path.GetFileName(path1);
+            foreach (Regex regex in ignoreNames)
+            {
+                if (regex.Match(path1).Success || regex.Match(path2).Success)
                 {
-                    if (regex.Match(Treat(path1)).Success || regex.Match(Treat(path2)).Success)
-                    {
-                        ignore = true;
-                        break;
-                    }
+                    return true;
                 }
-                if (!ignore)
+            }
+            return false;
+        }
+
+        private void EnumFiles(string directory, List<Regex> ignoreNames, bool ignoreHidden)
+        {
+            foreach (string s in Directory.EnumerateFiles(directory, "*", SearchOption.TopDirectoryOnly))
+            {
+                string relPath = Path.GetRelativePath(BaseDirectory, s);
+                if (IsIgnored(s, relPath, ignoreNames, ignoreHidden))
                 {
-                    _list.Add(new FileEntry(this, path1));
+                    continue;
                 }
+                _list.Add(new FileEntry(this, relPath));
             }
             foreach (string s in Directory.EnumerateDirectories(directory, "*", SearchOption.TopDirectoryOnly))
             {
-                string path1 = Path.GetRelativePath(BaseDirectory, s);
-                string path2 = Path.GetFileName(s);
-                bool ignore = false;
-                foreach (Regex regex in ignoreNames)
-                {
-                    if (regex.Match(Treat(path1)).Success || regex.Match(Treat(path2)).Success)
-                    {
-                        ignore = true;
-                        break;
-                    }
-                }
-                if (!ignore)
+                string relPath = Path.GetRelativePath(BaseDirectory, s);
+                if (IsIgnored(s, relPath, ignoreNames, ignoreHidden))
                 {
-                    EnumFiles(s, ignoreNames);
+                    continue;
                 }
+                EnumFiles(s, ignoreNames, ignoreHidden);
             }
             InvalidateNameToEntry();
         }
@@ -411,7 +414,7 @@ private static Regex ToRegex(string wildcard)
             return new Regex(buf.ToString());
         }
 
-        internal FileList(string baseDir, IList<string> ignoreNames)
+        internal FileList(string baseDir, IList<string> ignoreNames, bool ignoreHidden)
         {
             FileName = null;
             BaseDirectory = baseDir;
@@ -421,14 +424,14 @@ internal FileList(string baseDir, IList<string> ignoreNames)
                 ignores.Add(ToRegex(s));
             }
             ignores.Add(ToRegex(CHECKSUM_FILE));
-            EnumFiles(baseDir, ignores);
+            EnumFiles(baseDir, ignores, ignoreHidden);
             _list.Sort();
             Checksum = new byte[0];
         }
 
-        public static FileList CreateByDirectory(string directory, IList<string> ignoreNames, string compressDirectory)
+        public static FileList CreateByDirectory(string directory, IList<string> ignoreNames, bool ignodeHidden, string compressDirectory)
         {
-            return new FileList(directory, ignoreNames)
+            return new FileList(directory, ignoreNames, ignodeHidden)
             {
                 CompressedDirectory = compressDirectory,
                 DestinationDirectory = directory,