To provide a drop prevention tool for a portable telephone and PHS which can be easily mounted to any kinds of telephones and can be handled easily and does not require a troublesome operation which has been needed to make a telephone call.

In a strap 1, a hook-and-Loop fastener 3 is attached to a webbing strap 2 and a hook-and-loop fastener 6 is attached to a stopper 5 for fixing the webbing strap 2 and a braid 4. In a plate 9, a hook-and-loop fastener is attached to a middle plate to which a braid 10 is attached, and a hook-and-loop fastener 8 is provided for a clip 7 and the fastener 8 is closely adhered to the fasteners 3, 6.