To realize a mounting tool and the like for which an appropriate fastening force can be set. A mounting tool (1) has a collar portion (10), a belt portion (20) having one end coupled to the collar portion and extending to the back of an animal through an underarm of a dog when mounting the mounting tool on the animal, and a coupling portion (22) for adjusting the length of the belt portion, wherein the belt portion shows a mounting tool indicator (26) corresponding to a measuring tool indicator (71) shown on an indicator belt (70) of a measuring tool (2), to allow the coupling portion to adjust the length of the belt portion.
