A hand strap for a portable electronic device is disclosed, wherein the hand strap comprises a fastened portion, a supporting portion and a holding portion. The fastened portion is fixed on a rear surface of the portable electronic device. The supporting portion has a first support body and a second support body. The second support body is rotatable to pivot on the fastened portion in accordance with an axis which is perpendicular to the rear surface of the portable electronic device. In a folded state, the first support body and the second support body are attached to each other. In an extended state, the first support body is inclined an angle corresponding to the second support body so as to support the portable electronic device.