Pieter Claesz was a Dutch Golden Age painter of still lifes.

He was born in Berchem, Belgium, near Antwerp, where he became a member of the Guild of St. Luke in 1620. He moved to Haarlem in 1620, where his son, the landscape painter Nicolaes Pieterszoon Berchem was born (October 1). He and Willem Claeszoon Heda, who also worked in Haarlem, were the most important exponents of the "ontbijt" or dinner piece.