The portable electronic device according to the present invention comprises a cabinet including an opening defined in a front surface thereof, a cover body opening and closing the opening of the cabinet, and a pivoting mechanism for pivotally supporting the cover body to the cabinet, the pivoting mechanism comprises a shaft and a pair of bearings supporting the shaft, the cabinet has an attaching part for attaching a string-like member, and the attaching part projects from the front surface of the cabinet. In this portable electronic device, the attaching part is disposed adjacent to the pivoting mechanism, the shaft which is a component of the pivoting mechanism includes a projecting part projecting toward the attaching part from one of the bearings closer to the attaching part, and the projecting part extends along a back surface which is a reverse side of the front surface of the cabinet.