Ivan Rachůnek (born July 6, 1981) is a Czech professional ice hockey forward playing for HC Sparta Praha of the Czech Extraliga. He was selected by the Tampa Bay Lightning in the seventh round (187th overall) of the 1999 NHL Entry Draft. Rachunek is the brother of Karel Rachunek and Tomas Rachunek who have also played professional ice hockey. Rachunek played with HC Zlín in the Czech Extraliga during the 2010–11 Czech Extraliga season.