Automatic dispenser of a sanitizing product, comprising a tank (1) of a sanitizing product, and a product drive mechanism, which is actuated by an infrared sensor (6), to dispense the product contained in the tank to through a nozzle (8); characterized in that the drive mechanism comprises a diaphragm pump (4), which is connected to a PLC programmable controller (5), to spray the sanitizing product through the nozzle (8), for a time and with a previously established pressure in the PLC programmable controller (5). (Machine-translation by Google Translate, not legally binding)