Abstract: A ball catching tool includes an outer leather member and an inner leather member inserted in the outer leather member. The inner leather member is formed by coupling a palm-side inner leather portion and a back-side inner leather portion to each other, and has a plurality of thumb and finger portions receiving the thumb and the fingers respectively. An interdigital extensional member is mounted on at least one portion between the bases of the finger portions. Thus, the extensional portion is provided between the bases of desired ones of the thumb and finger portions of the inner leather member for increasing the interval between the bases.