To easily and safely enjoy volleyball type sports without worrying about handicaps by utilizing the buoyancy of a light weight gas balloon.

A balloon 1 in which light weight gas is injected is connected to a fixing part 3 at the center of a court with a string 2 and a player hits it from his/her own court 6 through the lower part of a net 4 to the court of an opponent. In the court, an entrance inhibited zone 7 and a serve zone 8 are provided. By changing the length of a pole 5 for supporting the net 4, height from a floor surface to the net lower part is adjusted and a level is changed as well. A rule is a volleyball type and the player who gets stipulated points first wins. By changing equipment little by little matched with the ability and number of the player, even a person with the handicaps enjoys a game.