To move and adjust a heel cup member stepwise by utilizing one of a plurality of shaft holes formed at the locking arm part of the heel cup member and fixing a back part by a shaft for the back part composed of the heel cup member, a high back member and a high back piece.

This snowboard binding 10 attached to a fixing panel on a snowboard surface by a fixing and adjusting means si provided with a base plate 11 for freely adjusting the direction of boots, inner and outer brackets 12 and 13 are arranged on both side faces at the rear part and a front part bracket 14 and a strap supporting body 15 are integrally formed on both sides at the front. Then, at the inner and outer brackets 12 and 13, the back part composed of the heel cup member 21, the high back member 50 and the high back piece 30 is pivotally supported by the shaft P1. At the time, by fitting the shaft P1 to one of the plurality of shaft holes formed on one straight line at the left and right locking arm parts of the heel cup member 21, the back part is position adjustably fixed.