This rotation device for a game device, the rotation device being equipped with a light-emitting-device (700), is provided with: a rotating member (30) that rotates on a fixed member; a drive source for causing the rotating member (30) to rotate; a plurality of light-irradiated regions circumferentially set apart on the rotating member (30); a plurality of light sources (56) disposed annularly on the fixed member to constitute the light-emitting device (700), the light sources irradiating light onto the light-irradiated regions; a light-blocking body (4) formed on the rotating member (30), said light-blocking body preventing light radiated on a specific light-irradiated region (53t) that, among the plurality of light-irradiation regions, is to be irradiated with light, from leaking to other light-irradiation regions (53s, 53u) adjacent to said light-irradiation region (53t); and a control unit for controlling the timing of the change in the quantity of light from the light source (56). The light source (56) is illuminated and extinguished by the control unit in synchronization with the rotation of the specified irradiation region (53t) to be irradiated with light.