Parts is decreased in number for cost reduction. In the case where any trouble is encountered when connecting a conveyor unit (70) and an introduction unit (80) to each other due to a different external frame dimension of a game machine (11) and a combination of the game machine (11) and a pinball dispensing machine (20), the conveyor unit (70) and the introduction unit (80) are made to expand and contract in a conveying direction so as to provide a predetermined length, and then are secured to each other by adjustment screws (85b, 86b). Thus it is not necessary to newly manufacture a conveyor unit (70) and an introduction unit (80) of a different kind.
