Michał Zygmunt Ruciak (born 22 August 1983) is a Polish volleyball player, former member of the Poland men's national volleyball team, participant of the Olympic Games (London 2012), 2009 European Champion and gold medallist of the 2012 World League, silver medallist of the 2011 World Cup, bronze medallist of the 2011 European Championship and 2011 World League. On club level, he plays for Polish team Stal Nysa.