Hiroshi Tachi (舘ひろし, Tachi Hiroshi, born 31 March 1950 in Naka-ku, Nagoya) is a Japanese actor and singer.

His ancestors were samurai of the Owari Domain and the family of the former samurai.

He graduated from Chiba Institute of Technology. He was a leader of a rock 'n' roll group Cools but he left the group soon after he joined Toei film company and made his film debut with The Classroom of Terror. In 1983, he moved to Yujiro Ishiharas production company. In the 1980s, he won great popularity through his roles in the TV drama series Seibu Keisatsu and Abunai Deka.

In 2018, Tachi won the Best Actor award at the 42nd Montreal World Film Festival for his role in Owatta Hito.

As a singer Tachi is known for his hit song Nakanaide and appeared in the Kōhaku Uta Gassen twice.