To provide binding for snow board with which the fixed binding is hardly loosened, the leg parts of a rider are protected from impulse and a production of many kinds in small quantities can be dealt with as well.

Such binding 2 mounts boots at a central part on the surface side of snow board with suitable stance width or stand angle. Concerning binding 21, a bottom part 22, both side parts 23 and 23a formed facing upwards from the side faces of the bottom part 22 and rear part 24 linking both the side parts 23 and 23a into arcuate plan view are integrally formed into hollow.