Abstract: A compound protective helmet that allows easy and reliable operation of the visor. The helmet includes a bubble, a visor pivoted to the bubble, and a chin protector. A pad is provided between the bubble and the visor to allow two-stage lifting of the visor. A securing and release device is fixed in the chin protector, and includes two securing levers that are driven by a leading block and are held against a resilient element so as to be secured in grooves provided in the ear protector on both sides of the bubble. If a user wants to raise the visor, the pusher block is pushed to cause the securing levers to disengage from the grooves while lifting the visor.