A flushing device for a urinal comprises a connection unit and a control unit, wherein the connection unit can be fixed to the urinal and the control unit can be connected to the connection unit via an interface. The connection unit comprises a connection pipe with an inlet, for connection to a mains system, and an outlet, a flushing pipe with an inlet and an outlet for connection to a nozzle arrangement for discharging flushing water into the urinal bowl of the urinal, and a support element on which the outlet of the connection pipe and the inlet of the flushing pipe are mounted in a fixed position. The control unit comprises a support element on which are arranged at least one control element, a pipe section with an inlet and an outlet and a flushing valve, which is arranged between the inlet and outlet and has a power-supply element.