Abstract: Device for checking metallic pieces, in particular coins, characterized in that it includes:two motorized, integral, concentric disks (3, 4) rotating in a plane that is inclined in relation to the horizontal, namely:an internal, so-called separating disk (3), onto which the pieces are thrown in loose condition, and which is provided with substantially radial edges (7) for separating the pieces, andan outer, so-called piece-recognition disk (4), the periphery of which is provided with alveoles (8), located in prolongation of the edges (7) of the internal disk (7), for receiving the pieces thus separated, the said pieces being held in the said alveoles (8) by a sliding plate (13) located under the outer disk (4), and by a circular border (12) partially surrounding the said outer disk (4);a fixed semi-circular barrier (10) disposed at the separation between the inner disk (3) and the outer disk (4) for retaining the pieces on the inner disk (3) in the lower portion thereof, anda piece-recognition device comprisi