A clasp includes a lower holding member in which a lock pin is fixed, an upper holding member which is pivotably interlocked with the lower holding member, a lifting member which is attached to the lower holding member so as to be able to move in a lifting direction and a lowering direction and guides a first band, a lock member which is attached to the lower holding member so as to be able to pivot between a lock position and an unlock position, and a main cover. The lock member lifts the lifting member to the lower holding member side when being pivoted to the lock position so as to perform positioning and fixing of the first band while interposing the first band therebetween.