Peter Frischknecht (born 12 March 1946) is a Swiss former professional cyclo-cross cyclist. He notably won the Swiss National Cyclo-cross Championships in 1974 and 1978 in addition to 11 second-place finishes. He also won a silver medal at the UCI World Championships in 1976, 1977 and 1978. He is the father of Thomas Frischknecht and the grandfather of Andri Frischknecht, both also professional cyclists.