diff --git a/images/help.svg b/images/help.svg
deleted file mode 100644
index 91b8004391..0000000000
--- a/images/help.svg
+++ /dev/null
@@ -1,3 +0,0 @@
-<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M11 18H13V16H11V18ZM12 2C6.48 2 2 6.48 2 12C2 17.52 6.48 22 12 22C17.52 22 22 17.52 22 12C22 6.48 17.52 2 12 2ZM12 20C7.59 20 4 16.41 4 12C4 7.59 7.59 4 12 4C16.41 4 20 7.59 20 12C20 16.41 16.41 20 12 20ZM12 6C9.79 6 8 7.79 8 10H10C10 8.9 10.9 8 12 8C13.1 8 14 8.9 14 10C14 12 11 11.75 11 15H13C13 12.75 16 12.5 16 10C16 7.79 14.21 6 12 6Z" fill="#29304D" fill-opacity="0.6"/>
-</svg>
diff --git a/lib/domain/calendar/calendar_page.dart b/lib/domain/calendar/calendar_page.dart
index 528395770e..ef8b7c2208 100644
--- a/lib/domain/calendar/calendar_page.dart
+++ b/lib/domain/calendar/calendar_page.dart
@@ -1,14 +1,12 @@
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 import 'package:pilll/analytics.dart';
-import 'package:pilll/components/atoms/buttons.dart';
 import 'package:pilll/components/molecules/indicator.dart';
 import 'package:pilll/domain/calendar/calendar_state.dart';
 import 'package:pilll/domain/calendar/components/calendar_card.dart';
 import 'package:pilll/components/atoms/color.dart';
 import 'package:pilll/components/atoms/font.dart';
 import 'package:pilll/components/atoms/text_color.dart';
-import 'package:pilll/domain/calendar/components/calendar_help.dart';
 import 'package:pilll/domain/calendar/components/pill_sheet_modified_history/pill_sheet_modified_history_card.dart';
 import 'package:pilll/domain/home/home_page.dart';
 import 'package:pilll/domain/calendar/calendar_store.dart';
@@ -37,20 +35,6 @@ class CalendarPage extends HookWidget {
       return Scaffold(
         backgroundColor: PilllColors.background,
         appBar: AppBar(
-          leading: Container(),
-          actions: [
-            IconButton(
-              icon: SvgPicture.asset("images/help.svg"),
-              onPressed: () {
-                analytics.logEvent(name: "pressed_calendar_help");
-                showDialog(
-                    context: context,
-                    builder: (_) {
-                      return CalendarHelpPage();
-                    });
-              },
-            ),
-          ],
           title: CalendarModifyMonth(
               state: state,
               itemScrollController: itemScrollController,
diff --git a/lib/domain/calendar/components/calendar_help.dart b/lib/domain/calendar/components/calendar_help.dart
deleted file mode 100644
index 64f8fd230f..0000000000
--- a/lib/domain/calendar/components/calendar_help.dart
+++ /dev/null
@@ -1,126 +0,0 @@
-import 'package:pilll/components/atoms/buttons.dart';
-import 'package:pilll/components/atoms/color.dart';
-import 'package:pilll/components/atoms/font.dart';
-import 'package:pilll/components/atoms/text_color.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_svg/flutter_svg.dart';
-
-enum CalendarHelpPageRow {
-  menstruation,
-  nextPillSheet,
-  recordExists,
-  sex,
-  // hospital
-}
-
-extension CalendarHelpPageRowFunctions on CalendarHelpPageRow {
-  SvgPicture icon() {
-    switch (this) {
-      case CalendarHelpPageRow.menstruation:
-        return SvgPicture.asset(
-          "images/rectangle.svg",
-          color: PilllColors.menstruation,
-        );
-      case CalendarHelpPageRow.nextPillSheet:
-        return SvgPicture.asset(
-          "images/rectangle.svg",
-          color: PilllColors.duration,
-        );
-      case CalendarHelpPageRow.recordExists:
-        return SvgPicture.asset(
-          "images/oval.svg",
-        );
-      case CalendarHelpPageRow.sex:
-        return SvgPicture.asset(
-          "images/heart.svg",
-        );
-      // case CalendarHelpPageRow.hospital:
-      //   return SvgPicture.asset(
-      //     "images/hospital.svg",
-      //   );
-      default:
-        throw ArgumentError.notNull("");
-    }
-  }
-
-  Widget title() {
-    switch (this) {
-      case CalendarHelpPageRow.menstruation:
-        return Text(
-          "生理期間",
-          style: FontType.helpRow.merge(TextColorStyle.lightGray2),
-        );
-      case CalendarHelpPageRow.nextPillSheet:
-        return Text(
-          "新しいシート開始",
-          style: FontType.helpRow.merge(TextColorStyle.lightGray2),
-        );
-      case CalendarHelpPageRow.recordExists:
-        return Text(
-          "記録",
-          style: FontType.helpRow.merge(TextColorStyle.lightGray2),
-        );
-      case CalendarHelpPageRow.sex:
-        return Text(
-          "SEX",
-          style: FontType.helpRow.merge(TextColorStyle.lightGray2),
-        );
-      // case CalendarHelpPageRow.hospital:
-      //   return Text(
-      //     "来院予定日",
-      //     style: FontType.row.merge(TextColorStyle.lightGray2),
-      //   );
-      default:
-        throw ArgumentError.notNull("");
-    }
-  }
-}
-
-class CalendarHelpPage extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return AlertDialog(
-      title: Text(
-        "アイコンの説明",
-        style: FontType.subTitle.merge(TextColorStyle.black),
-      ),
-      content: Column(
-        mainAxisSize: MainAxisSize.min,
-        mainAxisAlignment: MainAxisAlignment.start,
-        children: <Widget>[
-          ...CalendarHelpPageRow.values.map((e) {
-            return Column(
-              children: <Widget>[
-                SizedBox(height: 16),
-                Row(
-                  mainAxisAlignment: MainAxisAlignment.start,
-                  children: <Widget>[
-                    ConstrainedBox(
-                      constraints: BoxConstraints.expand(
-                        width: 40,
-                        height: 12,
-                      ),
-                      child: Center(
-                        child: e.icon(),
-                      ),
-                    ),
-                    SizedBox(width: 16),
-                    e.title(),
-                  ],
-                ),
-              ],
-            );
-          }),
-        ],
-      ),
-      actions: <Widget>[
-        SecondaryButton(
-          text: "閉じる",
-          onPressed: () {
-            Navigator.of(context).pop();
-          },
-        ),
-      ],
-    );
-  }
-}