A dispensing head which can be mounted on a receptacle. The dispensing head includes a pump, for surmounting the receptacle, with an actuating rod having a longitudinal axis X. A diffuser is mounted on the pump, and includes a tube opening at a dispensing orifice, with the tube being elongated along an axis Y distinct from the axis X. A lever arm controls the actuation of the pump, with the lever arm including a portion capable of coming to bear on the diffuser in order to actuate the pump. In addition, a locking member is configured such that, in a first position, the locking member allows actuation of the pump and, in a second position, the locking member prevents actuation of the pump. In a disclosed example, in the second position the tube abuts against a portion of the locking member to prevent actuation of the pump.