To solve the problem that a binding for snowboard is usually fixed by screwing a bolt in a nut embedded in a snowboard, however, the bolt for fixing the binding is apt to become loosened due to various forces at the time of use, and maneuverbility decreases with loosening and when the loosening advances further, an injury of a user can be caused by failure or missing of the bolt.

This binding clamping member for snowboard is constituted of a binding main body, a plate which presses the bottom surface of the binding main body from the upper side, and a clamping member which fixes the binding main body to the snowboard through the pressing plate. The clamping member comprises a bolt and a washer, and has a first anti-rotating means which is provided between the washer and the pressing plate, and a second anti-rotating means which is provided between the bolt and the washer. Thus, loosening during use is prevented from occurring, and in addition, the anti-loosening capability does not decrease even when the attaching/detaching is repeated.