A dispenser head (1) comprises a main body (2), an arm (60) hinged to the main body (2) and pumping means. The pumping means comprise a main cylinder (12), a sliding piston (16), dispensing means sensitive to pressure. The arm (60) is hinged to the main body (2) in a hinging portion (60b) distanced radially from the body axis (X), straddling the body axis (X) and transmitting an axial translation movement to the piston (16) by means of an elastically yielding element (30). A removable lock or tab can be included as a safety means.