EN
Explaining the matter of effectiveness of left and right-handed players is very important taking into account the equalizing level of technical preparation of players. Therefore, the study was based on the skills of highly advanced volleyball players from different countries. In the study there was compared effectiveness of performance of left-handed and right-handed players in selected offensive activities. Then the rating of skills of game differentiation made by right-handed players and left-handed setters was executed and there were compared the options of attack performed by left-handed and right-handed players. There were analyzed matches of the highest ranks of the sport competitions: World League 2007–2011 and Olympic Games 2008. The study involved 80 top-level volleyball players, including 22 left-handed ones. There was used an indirect method of an observation. The results draw attention to the role and significance of left-handed players in volleyball. They also show the particular usefulness of left-handed players, whose usage of mirrored technique can add up to a tactical variety of the game.