The invention relates to a multifunctional sanitary hair-washing device comprising two parts that can be detachably connected. The parts are formed by blanked laminar templates and comprise undercuts for coming into contact with the neck of the user, forming a front tub (1) and an additional rear element (2). The front tub (1) comprises at least one water outflow opening (3) used for washing the head. The two parts (1, 2) are joined by means of connecting means (6) which allow the movement of the additional rear element (2) over the front tub (1). Furthermore, the additional rear element (2) comprises at least one second undercut (8) on one side for coming into contact with the neck of the user in a second position of the hair-washing device, rendering said device more versatile.
