diff --git a/script/import_scripts/mybbru.rb b/script/import_scripts/mybbru.rb
new file mode 100755
index 0000000000..5857d7b55c
--- /dev/null
+++ b/script/import_scripts/mybbru.rb
@@ -0,0 +1,115 @@
+# frozen_string_literal: true
+
+require "csv"
+require File.expand_path(File.dirname(__FILE__) + "/base.rb")
+
+# Import script for forums created via mybb.ru service (or anything else that uses this simple JSON format),
+# using export format produced by https://github.com/AlexP11223/MybbRuUserscripts
+# Set ENV variables, e.g. "export JSON_TOPICS_FILE=my_path/threads.json", or set/use the paths in the constants below
+# If your forum has non-English usernames, don't forget to enable Unicode usernames in /admin/site_settings
+
+class ImportScripts::MybbRu < ImportScripts::Base
+
+  JSON_TOPICS_FILE_PATH ||= ENV['JSON_TOPICS_FILE'] || 'mybbru_export/threads.json'
+  JSON_USERS_FILE_PATH ||= ENV['JSON_USERS_FILE'] || 'mybbru_export/users.json'
+
+  def initialize
+    super
+
+    @imported_topics = load_json(JSON_TOPICS_FILE_PATH)
+    @imported_users = load_json(JSON_USERS_FILE_PATH)
+  end
+
+  def execute
+    puts "", "Importing from JSON file..."
+
+    import_users
+    import_categories
+    import_discussions
+
+    puts "", "Done"
+  end
+
+  def load_json(path)
+    JSON.parse(File.read(path))
+  end
+
+  def clean_username(name)
+    name.gsub(/ /, '')
+  end
+
+  def import_users
+    puts '', "Importing users"
+
+    create_users(@imported_users) do |u|
+      {
+        id: u['id'],
+        username: clean_username(u['name']),
+        email: u['email'],
+        created_at: Time.now
+      }
+    end
+  end
+
+  def import_categories
+    puts "", "importing categories..."
+
+    categories = @imported_topics.map { |t| t['category'] }.uniq
+
+    create_categories(categories) do |c|
+      {
+        id: c['id'],
+        name: c['name']
+      }
+    end
+  end
+
+  def import_discussions
+    puts "", "Importing discussions"
+
+    @imported_topics.each do |t|
+      first_post = t['posts'][0]
+
+      create_posts(t['posts']) do |p|
+        result = {
+          id: p['id'],
+          user_id: user_id_from_imported_user_id(p['author']['id']),
+          raw: fix_post_content(p["source"]),
+          created_at: Time.at(p['createdAt']),
+          cook_method: Post.cook_methods[:regular]
+        }
+
+        if p['id'] == first_post['id']
+          result[:category] = category_id_from_imported_category_id(t['category']['id'])
+          result[:title] = t['title']
+        else
+          parent = topic_lookup_from_imported_post_id(first_post['id'])
+          if parent
+            result[:topic_id] = parent[:topic_id]
+          else
+            puts "Parent post #{first_post['id']} doesn't exist. Skipping #{p["id"]}: #{t["title"][0..40]}"
+            break
+          end
+        end
+
+        result
+      end
+    end
+  end
+
+  def fix_post_content(text)
+    text
+      .gsub(/\[code\]/, "\n[code]\n")
+      .gsub(/\[\/code\]/, "\n[/code]\n")
+      .gsub(/\[video\]/, "")
+      .gsub(/\[\/video\]/, "")
+      .gsub(/\[quote.*?\]/, "\n" + '\0' + "\n")
+      .gsub(/\[\/quote\]/, "\n[/quote]\n")
+      .gsub(/\[spoiler.*?\]/, "\n" + '\0' + "\n").gsub(/\[spoiler/, '[details')
+      .gsub(/\[\/spoiler\]/, "\n[/details]\n")
+  end
+end
+
+if __FILE__ == $0
+  ImportScripts::MybbRu.new.perform
+end