The purpose of the present invention is to provide a glove that improves glove manipulability for a baseball player or a softball player. With respect to a glove formed by sewing together a back surface part (2) and a ball catching surface part (1) with a lace, a structure that improves the manipulability of such a glove, in particular, a catcher's mitt, is as follows. In a hand opening portion (5) of the back surface part (2), a slit (10a, 10b) is formed between the index finger and the middle finger and on the outside of the little finger. The thumb portion of the back surface part is provided with a thumbstall (21) into which a rigid piece of plastic or other such material is inserted while the little finger portion thereof is provided with a base supporting portion (23), thereby improving manipulability for opening and closing actions by the thumb and the little finger about the index finger. Meanwhile, the hand opening portion divided by the slits is structured so as to be fastened by an adjuster (11) that extends over the thumbstall to the little finger portion, thereby preventing the hand from slipping out when manipulating the glove.