Abstract: A washing device for removable dental protheses and other removable dental appliances which includes a base and a removable washing unit mountable on the base. The base has a housing on which the washing unit may be seated, a drive shaft vertically oriented in the housing, and an electric motor for rotating the drive shaft. The washing unit contains a pump adapted to be driven by the drive shaft, a filter assembly, and a fluid reservoir. A denture basket is centrally mounted for free rotation about a vertical axis within the washing unit. Spray nozzles are positioned in the reservoir wall and directed off-center toward the denture basket, causing the basket to rotate as the denture is being cleaned.