电通（日语：电通），为当今日本第一大也是世界最大单一广告公司。总部位于东京都港区东新桥汐留，并在多个国家设有据点。日本五大民营电视台之一的TBS电视也与其有密切关系。

Dentsu Inc.(株式会社电通,Kabushiki-gaisha Dentsū) is a Japanese international advertising and public relations company whose headquarters are located in the Dentsu Building in the Shiodome district of Minato, Tokyo. It is the parent company of Dentsu Aegis Network.