The present invention comprises: a wrist band part wound around a wrist of a baby； a body part which extends from the wrist band part to allow the baby to suck or chew the body part and has an inner space for receiving a hand of the baby； and a grip part, both ends of which are in contact with the body part so that the grip part extends across the inner space of the body part wherein, for storage, when the wrist band part is supported on the ground, the body part is vertically erected with respect to the ground without being tilted by self-weight thereof.
