Jirí Marušák (born 29 November 1975) is Czech former professional ice hockey defenceman.
Marušák played in the Czech Extraliga for HC Zlín, BK Mladá Boleslav, HC Plzen and HC Pardubice.
He also played in the SM-liiga for Tappara, the Elitserien for Djurgårdens IF and in the Russian Superleague and its successor the Kontinental Hockey League for Metallurg Novokuznetsk, SKA Saint Petersburg, HC CSKA Moscow and HC MVD.