Pär Arvidsson (born 27 February 1960 in Finspång) is a former butterfly swimmer from Sweden. He won the 100 m butterfly at the 1980 Summer Olympics in Moscow, after having set the world record in the same event a couple of months earlier in Austin, Texas. He held the record until April 1981. Between 1976 and 1983 he became Swedish champion 22 times. He held the Swedish record in the 200 butterfly until 2008. After graduating from the University of California, Berkeley with a degree in economics he attended and graduated from Harvard Business School.