diff --git a/EcomAnalysis/Form1.Designer.cs b/EcomAnalysis/Form1.Designer.cs
index 3747a5c..7c9cb0d 100644
--- a/EcomAnalysis/Form1.Designer.cs
+++ b/EcomAnalysis/Form1.Designer.cs
@@ -64,6 +64,8 @@
             this.columnHeader12 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
             this.columnHeader13 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
             this.label13 = new System.Windows.Forms.Label();
+            this.BtnOpenLog = new System.Windows.Forms.Button();
+            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
             this.SuspendLayout();
             // 
             // label1
@@ -447,12 +449,31 @@
             this.label13.TabIndex = 25;
             this.label13.Text = "HRV解析";
             // 
+            // BtnOpenLog
+            // 
+            this.BtnOpenLog.Font = new System.Drawing.Font("MS UI Gothic", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(128)));
+            this.BtnOpenLog.Location = new System.Drawing.Point(24, 621);
+            this.BtnOpenLog.Name = "BtnOpenLog";
+            this.BtnOpenLog.Size = new System.Drawing.Size(173, 38);
+            this.BtnOpenLog.TabIndex = 26;
+            this.BtnOpenLog.Text = "Logファイルを開く";
+            this.BtnOpenLog.UseVisualStyleBackColor = true;
+            this.BtnOpenLog.Click += new System.EventHandler(this.BtnOpenLog_Click);
+            // 
+            // openFileDialog1
+            // 
+            this.openFileDialog1.DefaultExt = "csv";
+            this.openFileDialog1.FileName = "openFileDialog1";
+            this.openFileDialog1.Filter = "CSVファイル|*.csv";
+            this.openFileDialog1.Title = "Logファイルを開く";
+            // 
             // Form1
             // 
             this.AllowDrop = true;
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(723, 671);
+            this.Controls.Add(this.BtnOpenLog);
             this.Controls.Add(this.label13);
             this.Controls.Add(this.listView2);
             this.Controls.Add(this.TxtVisit);
@@ -532,6 +553,8 @@
         private System.Windows.Forms.ColumnHeader columnHeader12;
         private System.Windows.Forms.ColumnHeader columnHeader13;
         private System.Windows.Forms.Label label13;
+        private System.Windows.Forms.Button BtnOpenLog;
+        private System.Windows.Forms.OpenFileDialog openFileDialog1;
     }
 }
 
diff --git a/EcomAnalysis/Form1.cs b/EcomAnalysis/Form1.cs
index 5c75eef..593828c 100644
--- a/EcomAnalysis/Form1.cs
+++ b/EcomAnalysis/Form1.cs
@@ -421,5 +421,17 @@
                 Analyze();
             }
         }
+
+        /// <summary>
+        /// ログファイルを開くボタン
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void BtnOpenLog_Click(object sender, EventArgs e) {
+            if (openFileDialog1.ShowDialog() == DialogResult.Cancel) return;
+            ClearData();
+            ReadCSV(openFileDialog1.FileName);
+            Analyze();
+        }
     }
 }
diff --git a/EcomAnalysis/Form1.resx b/EcomAnalysis/Form1.resx
index 1ac257b..a6dace9 100644
--- a/EcomAnalysis/Form1.resx
+++ b/EcomAnalysis/Form1.resx
@@ -120,4 +120,7 @@
   <metadata name="saveFileDialogCsv.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>17, 17</value>
   </metadata>
+  <metadata name="openFileDialog1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>165, 17</value>
+  </metadata>
 </root>
\ No newline at end of file