Abstract: An automatic back-cleansing apparatus for fixing to a vertical bath or shower surface includes a main housing section having a rotating head receiving section with gear teeth for engaging rotating heads on a rotating disk section adjacent the main housing section. The rotating disk section includes a drive shaft attached to a first drive gear and each rotating head includes a second drive gear engaging the gear teeth. Each of the rotating heads includes an interchangeable brush configured for removable fixation on a mushroom shaped projection torsionally coupled to the second drive gear, and a reservoir disposed in the main housing section dispenses a liquid soap onto at least one of the rotating heads.