To provide a keyboard instrument and a clamp for a connector permitting the routing of a cable without spoiling appearance of the keyboard instrument, with a simple structure.

Since the clamp 120 for the connector arranges the cable 94 in a space formed between the clamp 120 and a basis 113, it prevents the cable 94 laid along the side to the bottom of the basis 113 from exposing outside and reliably protects the cable 94. Since the cable 94 extended outside of a cable insertion hole 14B of a bottom plate 14 is fixed over the corner of the basis 113 and thus does not expose from the side of the basis 113, damage to the appearance of a piano 1 is restrained.