Heidi Pechstein (later Kunze, born 4 July 1944 in Leipzig) is a German former swimmer.
She competed in the 1960 and 1964 Summer Olympics and won a bronze medal in the 4 × 100 m freestyle relay in 1960.
In 1964 she finished sixth with the German team in the same event.At the 1962 European Aquatics Championships, she won a gold medal in the 4 × 100 m medley relay, setting the new world record.
For this achievement, the relay team members were named German Sportspersonalities of the Year in the team category in 1962.
Individually, Pechstein won a gold medal in the 100 m freestyle at the same championships and a silver medal in the 400 m medley four years later.
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