A music player is worn on a limb of a body when in use and includes: a case; a plurality of buttons through which an instruction relating to music reproduction is given; and a band fitting portion to which a band is fittable, the band being used when the case is worn on the limb. In the music player, the case has a chamfer constituted of a plane whose line of intersection with the band is diagonal to a longitudinal direction of the band, the plural buttons are provided on an upper face of the case, an arrangement direction of the plural buttons being parallel to the plane constituting the chamfer, and the chamfer has an audio output terminal. Preferably, the chamfer has a connection terminal to which an exercise state detection sensor for detecting a state of exercise practiced by a wearer of the music player is connectable.