Eugeniusz Knapik (born July 9, 1951 in Ruda Śląska) is a Polish pianist and composer of classical music best known for his 1980 chamber piece String Quartet No. 1. Knapik studied composition and piano with Henryk Górecki (1933–2010) and at the University of Music in Katowice. Later, he studied composition under Olivier Messiaen in Paris under a French government scholarship. As a pianist he has recorded widely, specialising mainly in 20th-century music. He has won numerous prizes for his compositions, including at the Festival of Polish Piano Interpretation in Słupsk, and the International Chamber Music Competition in Vienna.