To prevent a terminal of a cable connected to a connection terminal of portable electronic equipment from coming out.

The buckle 40 for adjusting length of a strap and fixing the strap is installed on the strap attached to the portable electronic equipment. A plurality of cable holding parts 42 and 43 integrally formed with the buckle 40 attachably/detachably support middle parts of cables 32 and 33 respectively. The connection terminals at one-side ends of the respective cables 32 and 33 are connected to the respective connection terminals of the portable electronic equipment, and the middle parts of the respective cables 32 and 33 are locked and set in the cable holding parts 42 and 43. When load to pull the other end sides of the cables 32 and 33 acts, it is received by the portable electronic equipment through the buckle 40 and the strap. Thus, the connection terminals of the cables 32 and 33 are prevented from coming out.