DAMPER DEVICE

A damper device is provided which can operate in a narrow space without the rotation space of the louvers being affected by the opening area of the damper device and which has reduced product dimensions in the plane direction of the gearbox. Specifically, this damper device is characterized by being provided with a drive source (40), multiple louvers (20), a frame body (10) and a power transmission mechanism (50). The frame body has a pair of openings (11, 12), the louvers are arranged in parallel in a flow path unit, the power transmission mechanism includes multiple gear members, and the frame body has a gearbox (10n), which is a case body in which the aforementioned multiple gear members are housed; the internal space of the gearbox is divided into multiple layers in the axial directionof the multiple gear members, and a reduction geartrain is configured by some of the multiple gear members housed in each layer passing through the housing layer and engaging with a gear member housed in another layer. 提供一种风