Abstract: A floating boat washing apparatus including a plurality of floats, at least two pair of rotating scrubbing brushes bearably carried and supported on support frames, a rotating bogie frame on which the support frames of the scrubbing brushes are bearably carried and a frame structure or comparable fixed construction on which the rotating bogie frame is mounted. The rotating bogie frame is mounted by means of support shafts articulated at both ends of a suspension triangle so that the bogie frame is rotatable around the transverse axis of the boat whereby the scrubbing brush pairs are movable in an upright position relative to each other.