diff --git a/Form1.Designer.cs b/Form1.Designer.cs
index 4f536e7..cb750a4 100644
--- a/Form1.Designer.cs
+++ b/Form1.Designer.cs
@@ -69,7 +69,7 @@ private void InitializeComponent()
             this.autoScroll = new System.Windows.Forms.CheckBox();
             this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
             this.contextMenuStrip2 = new System.Windows.Forms.ContextMenuStrip(this.components);
-            this.timer1 = new System.Windows.Forms.Timer(this.components);
+            this.timerReadSerial = new System.Windows.Forms.Timer(this.components);
             this.timerReconnect = new System.Windows.Forms.Timer(this.components);
             this.grpSetting.SuspendLayout();
             this.groupBox1.SuspendLayout();
@@ -589,11 +589,11 @@ private void InitializeComponent()
             this.contextMenuStrip2.Name = "contextMenuStrip2";
             this.contextMenuStrip2.Size = new System.Drawing.Size(61, 4);
             // 
-            // timer1
+            // timerReadSerial
             // 
-            this.timer1.Enabled = true;
-            this.timer1.Interval = 20;
-            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
+            this.timerReadSerial.Enabled = true;
+            this.timerReadSerial.Interval = 20;
+            this.timerReadSerial.Tick += new System.EventHandler(this.timerReadSerial_Tick);
             // 
             // timerReconnect
             // 
@@ -656,7 +656,7 @@ private void InitializeComponent()
         private System.Windows.Forms.ContextMenuStrip contextMenuStrip2;
         private System.Windows.Forms.CheckBox checkEnter;
         private System.Windows.Forms.CheckBox reconnect;
-        private System.Windows.Forms.Timer timer1;
+        private System.Windows.Forms.Timer timerReadSerial;
         private System.Windows.Forms.Button reload_COM;
         private System.Windows.Forms.ComboBox cmbCRLF;
         private System.Windows.Forms.Button btnSaveRcv;
diff --git a/Form1.cs b/Form1.cs
index 116a404..50199c9 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -258,8 +258,8 @@ private void RcvDataToTextBox(string data)
         }
 
         bool last_is_newline=false;
-        bool first_timestamp = false;
-        private void timer1_Tick(object sender, EventArgs e)
+        bool first_timestamp = true;
+        private void timerReadSerial_Tick(object sender, EventArgs e)
         {
             //https://atmarkit.itmedia.co.jp/ait/articles/0511/11/news117.html
             if (serialPort1.IsOpen == false)
@@ -275,7 +275,10 @@ private void timer1_Tick(object sender, EventArgs e)
 
                 if (checkBIN.Checked)
                 {
-                    new_text.Append(timestamp);
+                    if (check_timestamp.Checked)
+                    {
+                        new_text.Append(timestamp);
+                    }
 
                     while (serialPort1.BytesToRead>0)
                     {
diff --git a/Form1.resx b/Form1.resx
index f406b44..07b8aec 100644
--- a/Form1.resx
+++ b/Form1.resx
@@ -118,19 +118,19 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <metadata name="serialPort1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 17</value>
+    <value>9, 8</value>
   </metadata>
   <metadata name="contextMenuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>204, 17</value>
+    <value>102, 8</value>
   </metadata>
   <metadata name="contextMenuStrip2.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>483, 17</value>
+    <value>242, 8</value>
   </metadata>
-  <metadata name="timer1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+  <metadata name="timerReadSerial.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>759, 15</value>
   </metadata>
   <metadata name="timerReconnect.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>1043, 16</value>
+    <value>522, 8</value>
   </metadata>
   <metadata name="$this.TrayHeight" type="System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>130</value>
diff --git a/Properties/AssemblyInfo.cs b/Properties/AssemblyInfo.cs
index e291d13..50065a4 100644
--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@
 // すべての値を指定するか、次を使用してビルド番号とリビジョン番号を既定に設定できます
 // 既定値にすることができます:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("6.0.0.0")]
-[assembly: AssemblyFileVersion("6.0.0.0")]
+[assembly: AssemblyVersion("7.0.0.0")]
+[assembly: AssemblyFileVersion("7.0.0.0")]