Alexandre "Alex" Czerniatynski (born 28 July 1960) is a Belgian former footballer who played as a striker.

Czerniatynski played for Charleroi, Antwerp, Anderlecht, Standard, Antwerp again, KV Mechelen, Germinal Ekeren and Tilleur-Liège. He was part of the team when Antwerp played its last European final against Parma in 1993, as well as in that of Anderlecht for its two European finals in 1983 and 1984 (scoring in the latter). Anderlecht played its last European final in 1990.

Czerniatynski played 31 games, scoring six goals, for Belgium. He was also in the Belgian team for the 1982, scoring one goal, and 1994 World Cups as well as for the Euro 1984 but he did not play a game in that tournament.

On 27 April 2009, K.S.K. Beveren officials sacked Czerniatynski as coach. On 6 June 2010, it was announced that Czerniatynski would become the new head coach of Olympic Charleroi.