Cable reel structure

There are provides a flat cable (14) containing several conductor elements, and corresponding bus bars (16). An end portion of each of the conductor elements is welded to a first end portion of each of bus bars (16). A second end portion of each of the bus bars (16) is formed into a terminal. Meanwhile, a cable reel comprises a mobile member (11) and a fixed member (12). The mobile member (11) and/or the fixed member (12) is(are) provided with a connector unit (18, 19) having an outward opening. The terminal of each of the bus bars (16) is extended in the connector unit (18, 19) through a terminal path hole (18a), whilst a terminal of an outside electrical cable (w) is inserted into the connector unit (18, 19) through the outward opening of the connector unit, so that the bus-bar terminal and the electrical cable terminal are fitted and connected to each other.