A flushing device (1) includes a flush liquid pipe (6) arranged in an enclosed space (2) with at least one flush head (7) which is substantially rotatable about the longitudinal axis (A) of the flush liquid pipe, and a nozzle device (8) arranged on said flush head, being substantially rotatable about an axis (B) extending substantially transversely to the longitudinal axis of said flush liquid pipe, having one or more nozzles (9, 11) for the provision of one or more flush liquid streams (10, 12) directed substantially against the inside of the enclosed space for the cleaning thereof. To provide a flushing device (1) which also permits cleaning of components of the flushing device (1) which are located within the enclosed space (2), at least one of the one or more nozzles (9, 11) of the nozzle device (8) are arranged and/or formed such that at least a portion of the flush liquid streams (10 and 12) from the nozzle during at least a portion of the rotation of the nozzle device contacts the flush liquid pipe (6) along a portion of the periphery of the flush liquid pipe and such that at least the portion of the flush liquid stream from the nozzle contacts the flush liquid pipe during rotation of the flush head (7) along the entirety of, or a portion of, its periphery, thereby cleaning the flush liquid pipe.