diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 66c93e423a6..26fd64cdb40 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -47,7 +47,7 @@ def course_params
     params.require(:course).permit(
       :title,
       :description,
-      :is_opened,
+      :open,
       category_ids: []
     )
   end
diff --git a/app/views/courses/_course.html.slim b/app/views/courses/_course.html.slim
index cd77024412c..a79c8e4266d 100644
--- a/app/views/courses/_course.html.slim
+++ b/app/views/courses/_course.html.slim
@@ -1,10 +1,10 @@
 .col-xxl-3.col-xl-4.col-lg-4.col-md-6.col-xs-12
-  .courses-item(id="course_#{course.id}" class="#{course.open_course ? 'is-opened' : 'is-closed'}")
+  .courses-item(id="course_#{course.id}" class="#{course.open ? 'is-opened' : 'is-closed'}")
     .courses-item__inner.a-card
       header.courses-item__header
         h3.courses-item__title
           = link_to [course, :practices], class: 'courses-item__title-link' do
-            - if admin_login? && !course.open_course
+            - if admin_login? && !course.open
               .courses-item__title-icon.is-closed
                 | 非表示
             span.courses-item__title-label
diff --git a/app/views/courses/_form.html.slim b/app/views/courses/_form.html.slim
index ed3b4aa80c2..0a3ea7c7557 100644
--- a/app/views/courses/_form.html.slim
+++ b/app/views/courses/_form.html.slim
@@ -10,7 +10,7 @@
       .col-md-6.col-xs-12
         = f.label 'コースを表示する', class: 'a-form-label'
         label.a-on-off-checkbox.is-md
-          = f.check_box :is_opened, class: 'is-open-checkbox'
+          = f.check_box :open, class: 'is-open-checkbox'
           span#checkbox-open-course
   .form-item
     .row.js-markdown-parent
diff --git a/app/views/courses/index.html.slim b/app/views/courses/index.html.slim
index 1cfcb19e462..e583734e348 100644
--- a/app/views/courses/index.html.slim
+++ b/app/views/courses/index.html.slim
@@ -18,4 +18,4 @@ header.page-header
         - if current_user&.admin?
           = render @courses.order(:created_at)
         - else
-          = render @courses.where(open_course: true).order(:created_at)
+          = render @courses.where(open: true).order(:created_at)
diff --git a/db/migrate/20210805050956_add_open_course_to_courses.rb b/db/migrate/20210805050956_add_open_course_to_courses.rb
deleted file mode 100644
index e8e592dd684..00000000000
--- a/db/migrate/20210805050956_add_open_course_to_courses.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddOpenCourseToCourses < ActiveRecord::Migration[6.1]
-  def change
-    add_column :courses, :open_course, :boolean, default: false, null: false
-  end
-end
diff --git a/db/migrate/20210916061442_rename_open_course_column_to_courses.rb b/db/migrate/20210916061442_rename_open_course_column_to_courses.rb
deleted file mode 100644
index c99f542a8f3..00000000000
--- a/db/migrate/20210916061442_rename_open_course_column_to_courses.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class RenameOpenCourseColumnToCourses < ActiveRecord::Migration[6.1]
-  def change
-    rename_column :courses, :open_course, :is_opened
-  end
-end
diff --git a/db/migrate/20210923053650_add_open_to_courses.rb b/db/migrate/20210923053650_add_open_to_courses.rb
new file mode 100644
index 00000000000..b55f12d425d
--- /dev/null
+++ b/db/migrate/20210923053650_add_open_to_courses.rb
@@ -0,0 +1,5 @@
+class AddOpenToCourses < ActiveRecord::Migration[6.1]
+  def change
+    add_column :courses, :open, :boolean, default: false, null: false
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 364fe81d9ac..04d8c172c90 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_09_16_061442) do
+ActiveRecord::Schema.define(version: 2021_09_23_053650) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -140,7 +140,7 @@
     t.text "description", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.boolean "is_opened", default: false, null: false
+    t.boolean "open", default: false, null: false
   end
 
   create_table "courses_categories", force: :cascade do |t|