Rostislav Olesz (born 10 October 1985) is a professional ice hockey left winger for HC Olomouc of the Czech Extraliga (ELH).

On 24 June 2011, Olesz was traded by the Florida Panthers to the Chicago Blackhawks in exchange for defenceman Brian Campbell.

[1] On 17 November 2011, Olesz was assigned by the Blackhawks to their American Hockey League (AHL) affiliate, the Rockford IceHogs, after clearing waivers.

[3] Olesz quickly signed a one-year contract as a free agent with the New Jersey Devils on 5 July 2013.

[5] On 21 November, Olesz left North America and signed for the remainder of the season with the Swiss club SC Bern of the National League A.