Pekka "Juha" Rantasila (born June 5, 1945) is a Finnish former professional ice hockey player who played in the SM-liiga.

He played for Porin Karhut and HIFK.

Rantasila was inducted into the Finnish Hockey Hall of Fame in 1989.

Currently, he works a lawyer.

This biographical article relating to a Finnish ice hockey player is a stub.