PURPOSE: To reduce the manufacturing cost by shortening length of a cable to be used.

CONSTITUTION: A flat cable 33 is housed inside a case body 32 to form a reel device 31 for cable. The case body 32 is formed by combining an upper case 35 and a lower case 36 freely to turn. The flat cable 33 is housed between a winding shaft 41a provided in the upper case 35 and a winding frame 36b provided in the lower case 36. A guide body 44 connected to one end of the flat cable 33 is supported by the upper case 35 freely to turn, and a connector 33a provided in the other end of the flat cable 33 is fixed to the winding frame 36b. Since the end of the flat cable 33 is not bent when it is wound around of the winding shaft 41a, necessity for providing a length margin of the flat cable 33 is eliminated.