To enable a grip left from a gripping hand to be easily pulled back to restore a gripping state by an auxiliary strap even in a state the grip is dangling down from a wrist.

Right and left symmetric main straps A are formed of a wrist ring part 5 made of flexible synthetic resin, rubber, etc., an extensible part 6 made of an elastic material, a stopping part equipped with a male velvet type fastener on the back side, and a tying strap 8 respectively fixed by sewing, etc. A female type velvet fastener and a male velvet type fastener are fixed on the surface of the wrist ring part 5. The both ends of the tying strap 8 is fixed to the both ends of the wrist ring part 5 and double-folded at a proper length to overlap the tying strap on the folded part and fixed by an eyelet. A strap part 3a of an auxiliary strap 3 is passed through between the thumb and the index finger and fixed by engaging parts 9, 9' equipped with female velvet type fasteners on the surface and the back side of the both ends of the strap part 3a. The strap part 3a of the auxiliary strap 3 is inserted through a hole of the eyelet of the tying strap 2.