diff --git a/wbackup/Program.cs b/wbackup/Program.cs
index c8da4de..858ba60 100644
--- a/wbackup/Program.cs
+++ b/wbackup/Program.cs
@@ -5,6 +5,7 @@
 using System.IO.Enumeration;
 using System.Linq;
 using System.Threading;
+using System.Security.Cryptography;
 using System.Security.Cryptography.X509Certificates;
 using ICSharpCode.SharpZipLib.GZip;
 using ICSharpCode.SharpZipLib.Tar;
@@ -15,31 +16,67 @@
     class Program
     {
         public static CommandParser param;
+        public static int maxThreadLimit = 4;
+
+        class FileInformation
+        {
+            public string fileName;
+            public uint hash;
+        };
 
         static void Main(string[] args)
         {
             var sw = new System.Diagnostics.Stopwatch();
 
-            string[] storedTarget = { ".mov", ".mp4", ".mpg", ".mpeg", ".jpg", ".jpeg", ".png", ".gif", ".zip" };
-
             param = new CommandParser(args);
-            ConcurrentQueue<string> srceFilesQueue = new ConcurrentQueue<string>(Directory.GetFiles(param.sourceDir, "*.*", SearchOption.AllDirectories));
-
             string postFixString = DateTime.Now.ToString("yyyyMMddHHmmss");
+            string[] storedTarget = { ".mov", ".mp4", ".mpg", ".mpeg", ".jpg", ".jpeg", ".png", ".gif", ".zip" };
 
             StreamWriter logws = null;
             if (param.logFileName != "")
             {
                 logws = File.CreateText(param.logFileName + "-" + postFixString + ".log");
             }
-            int totalFileCount = srceFilesQueue.Count;
+
+            List<string> fileNameList = new List<string>(Directory.GetFiles(param.sourceDir, "*.*", SearchOption.AllDirectories));
+
+            // 圧縮率を高めるためにファイルをソートする
+            var hashAlgorism = SHA256.Create();
+            List<FileInformation> sortedTemp = new List<FileInformation>();
+            foreach (var fileName in fileNameList)
+            {
+                byte []hashData = hashAlgorism.ComputeHash(File.OpenRead(fileName));
+                uint hashTemp = (uint)hashData[0] ^ (((uint)hashData[1]) << 8) ^ (((uint)hashData[2]) << 16) ^ (((uint)hashData[3]) << 24);
+                sortedTemp.Add(new FileInformation() { fileName = fileName, hash = hashTemp });
+            }
+            List<FileInformation> sortedList = new List<FileInformation>(sortedTemp.OrderBy((x) => x.hash));
+
+            // ハッシュ化したデータを各Threadに振り分ける
+            ConcurrentQueue<string>[] srceFilesQueue = new ConcurrentQueue<string>[maxThreadLimit];
+            for (int i = 0;i < maxThreadLimit;i++)
+            {
+                srceFilesQueue[i] = new ConcurrentQueue<string>();
+                int beginIndex = (i * fileNameList.Count / maxThreadLimit);
+                int lastIndex = ((i + 1) * fileNameList.Count / maxThreadLimit);
+                if (maxThreadLimit == (i + 1))
+                {
+                    lastIndex = fileNameList.Count;
+                }
+
+                for (int j = beginIndex; j < lastIndex; j++)
+                {
+                    srceFilesQueue[i].Enqueue(sortedList[j].fileName);
+                }
+            }
+
+            int totalFileCount = fileNameList.Count;
             int archiveFileCount = 0;
             int exceptionCount = 0;
             Mutex consoleLock = new Mutex();
 
             sw.Start();
 
-            Parallel.For(0, 1, i =>
+            Parallel.For(0, maxThreadLimit, i =>
             {
                 // アーカイブ先ファイルのインスタンスを作成
                 string zipFileName = param.destinationDir + "-" + postFixString + "-" + i.ToString("00") + ".tar.gz";
@@ -56,7 +93,7 @@
                     readBuffer[0] = new byte[buffSize];
                     readBuffer[1] = new byte[buffSize];
 
-                    while (srceFilesQueue.TryDequeue(out string srceFileName))
+                    while (srceFilesQueue[i].TryDequeue(out string srceFileName))
                     {
                         try
                         {
@@ -122,7 +159,7 @@
                         }
                         catch (Exception exp)
                         {
-                            srceFilesQueue.Enqueue(srceFileName);
+                            srceFilesQueue[i].Enqueue(srceFileName);
 
                             var curtExceptionCnt = Interlocked.Increment(ref exceptionCount);
 
@@ -147,15 +184,18 @@
             sw.Stop();
             Console.WriteLine("TotalMilliseconds = {0}", sw.Elapsed.TotalMilliseconds);
 
-            Console.WriteLine("Finished {0} archived, {1} skipped, {2} aborted.", archiveFileCount, totalFileCount - archiveFileCount, srceFilesQueue.Count);
+            Console.WriteLine("Finished {0} archived, {1} skipped, {2} aborted.", archiveFileCount, totalFileCount - archiveFileCount, totalFileCount);
             if (logws != null)
             {
                 logws.Flush();
-                logws.WriteLine("Finished {0} archived, {1} skipped, {2} aborted.", archiveFileCount, totalFileCount - archiveFileCount, srceFilesQueue.Count);
+                logws.WriteLine("Finished {0} archived, {1} skipped, {2} aborted.", archiveFileCount, totalFileCount - archiveFileCount, totalFileCount);
 
-                foreach (var fileName in srceFilesQueue)
+                for (int i = 0; i < maxThreadLimit; i++)
                 {
-                    logws.WriteLine("aborted, {0}", fileName);
+                    foreach (var fileName in srceFilesQueue[i])
+                    {
+                        logws.WriteLine("aborted, {0}", fileName);
+                    }
                 }
                 logws.Close();
             }