Jan Kačer (3 October 1936 – 24 May 2024) was a Czech actor and theatrical director. He appeared in more than sixty films from 1960 onwards.

Kačer studied theatrical directing at DAMU. He was an actor and a director in The Drama Club and later Theatre on the Balustrade. Kačer was a parliamentary representative in the Federal Assembly from 1990 to 1992. His wife was the actress Nina Divíšková.

Kačer died on 24 May 2024, at the age of 87.