A toe strap of a snowboard binding is constituted of one belt to fasten an upper portion of a tiptoe of a boot and another belt to fasten a tip of the tiptoe of the boot, and it is a problem to have a configuration to guide the toe strap so as to be fastened to an appropriate position with respect to a shape of the tiptoe portion of the boot when the boot is mounted. At least any one belt of the one belt and the other belt of the toe strap includes an extending portion that extends at least any direction of front and rear on a center position in a lateral direction, and the extending portion of the belt is configured to abut on the boot prior to a non-extending portion of the belt on an adjacent position when the boot is mounted.