This study is made on two volleyball players chosen out of the members of the volleyball club in Kisarazu National College of Technology. The one is a skilled player and the other is not. Blocking forms are analyzed by comparing the motion of the arms of each player through a video camera. The results are as follows. 1) There is clear difference in blocking form between the skilled blocker and the unskilled one. 2) The analysis of the form of the skilled blocker shows that his arms are straightly stretched out over the net in the course of jumping. This is named here the "stretching out" type. 3) In the case of the unskilled blocker, his arms are swung downward at the highest point. This is named the "swinging downward" type. This study suggests that the coaches should pay more attention to the motion of the arms of blockers than they have, and the unskilled players should be coached with the "stretching out" type.
