Pierre Alechinsky (born 19 October 1927) is a Belgian artist. He has lived and worked in France since 1951. His work is related to tachisme, abstract expressionism, and lyrical abstraction.

Alechinsky was born in Schaerbeek. In 1944 he attended the l’École nationale supérieure d’Architecture et des Arts décoratifs de La Cambre, Brussels where he studied illustration techniques, printing and photography. In 1945 he discovered the work of Henri Michaux, Jean Dubuffet and developed a friendship with the art critic Jacques Putman.