To communicate with a distinguishment medium of all rental goods even if the rental goods are placed in the complicated state.

Transmitting antenna coils 25a-25f and receiving antenna coils 26a-26f are provided on six surfaces of detection box 24. A goods box accommodating rental goods recovered is accommodated in the detection box 24. An ID tag communicatable by an electric wave is provided on the rental goods. The transmitting antenna coils 25a-25f and the receiving antenna coils 26a-26f of the detection box 24 are successively made effective in every each surface in order to detect the rental goods accommodated in the goods box. So, since a direction of the electric wave transmitted from the detection box 24 side is varied, the ID tag communicates with the transmitting antenna coil and a receiving antenna coil on any one surface.