Pyotr Ivanovich Pochynchuk (Belarusian: Пётар Іванавіч Пачынчук; Russian: Пётр Иванович Починчук) (July 26, 1954 – December 1, 1991) was a Soviet athlete who mainly competed in the men's 20 kilometer walk during his career. Born in Lyakhovichi, Brest Oblast, he trained at the Armed Forces sports society in Grodno.

He competed for the USSR at the 1980 Summer Olympics held in Moscow, Soviet Union where he won the silver medal in the men's 20 kilometer walk competition.

International competitions

Year Competition Venue Position Event Notes
Representing  Soviet Union
1978 European Championships Prague, Czechoslovakia 2nd 20 km 1:23:43.0
1980 Olympic Games Moscow, Soviet Union 2nd 20 km 1:24:45.4
1981 World Race Walking Cup Valencia, Spain 8th 20 km 1:27:03
1982 European Championships Athens, Greece 10th 20 km 1:30:13
1983 World Championships Helsinki, Finland 13th 20 km 1:24:55