This invention finds application in the field of liquid distributing devices, and more particularly relates to a sprinkler head device, for example for use in sprinkler systems for distributing liquids or the like. The device comprises a support body to be removably coupled to a sleeve for connection to an external liquid supply line, a convergent nozzle between the body and the sleeve, and a diverter member downstream from the nozzle for diverting flow and sprinkling fluid out. The device further includes main connection means for removably attaching the nozzle to the support body while preventing any accidental separation thereof upon mutual coupling and uncoupling of the sleeve to the body, thereby allowing fast and easy periodic replacement of the nozzle.