Abstract: A hose fitting includes a clamping ring acting from the outside which upon an axial displacement moves clamping jaws mounted at a base body into an active or inactive position, whereby a plurality of control surfaces located at the base body in a circumferentially distributed manner and extending obliquely or inclined relative to the longitudinal axis of the body rest against correspondingly shaped counter surfaces of the clamping ring in such a manner that upon a rotating of the ring it moves axially and operates the clamping jaws.