diff --git a/AgileWorks/AgileWorks/WebView/View/WebViewController.swift b/AgileWorks/AgileWorks/WebView/View/WebViewController.swift
index 767b0570156a0fd8d58f981be7e6441b1845a27b..ce813a487340349ba833b21226d400c45952ab39 100644
--- a/AgileWorks/AgileWorks/WebView/View/WebViewController.swift
+++ b/AgileWorks/AgileWorks/WebView/View/WebViewController.swift
@@ -120,6 +120,10 @@ class WebViewController: UIViewController {
         self.mainWebView.addGestureRecognizer(tapWebView)
         // 回転時リサイズ設定
         mainWebView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        // subView があれば、一旦削除
+        for subView in self.formView.subviews {
+            subView.removeFromSuperview()
+        }
         self.formView.addSubview(mainWebView)
 
         mainWebView.navigationDelegate = self