A portable electronic device is provided, in which a region for joining a body to a member-to-be-fixed is designed to be narrow, and the body and the member-to-be-fixed are strongly joined together. The portable electronic device is provided with a body 2A and a member-to-be-fixed 3a, which is bonded and fixed to the body 2A by way of an adhesive 231. The body 2A has: a first face 22, on which the member-to-be-fixed 3a is mounted; and a second face 23, which is bonded to the member-to-be-fixed 3a, in a state where the second face 23 is at a distance from the member-to-be-fixed 3a by interposing the adhesive 231, and the second face 23 is in an intersecting positional relationship with the first face 22.