A strap used in a portable terminal includes a plate portion configured to be mounted on a surface of a main body of the portable terminal by attaching to a strap fixing portion of the main body, a rotation mechanism portion located at a substantially central portion of the plate portion and having a rotation axis located in a fourth area of the main body when the strap is mounted to the main body, a grip portion provided on the rotation mechanism portion, and a folded portion provided on the plate portion, and located at a position of a third area of the main body so as to be substantially orthogonal to a longitudinal direction, and to be bent in a direction toward the surface of the portable terminal when the strap is mounted to the main body.