Abstract: Disclosed is a grip grasping support device of a golf club for supporting at least one finger which grasps a grip to be contacted tightly with the grip from a hand grasping a grip of a golf club, comprising: a first and second ring-shaped members which are fitted to the grip of a golf club and separated at predetermined distance; and a band member to one end of which the first ring-shaped member is fixed and the other end of which is fitted into the second ring-shaped member to be arranged overlapping toward the one end side, and on which Velcro cloths are arranged respectively on surfaces of parts located between the one end and the second ring-shaped member and between the other end and the second ring-shaped member, facing each other.