Protective headgear equipment with respiratior and optical shield

The invention concerns a protective headgear comprising a respirator ( 2 ) capable of being connected to a breathing mixture source, an eye protecting shield ( 5 ) and first ( 32 ) and second ( 56 ) lock elements, respectively located on the respirator ( 2 ) and on the shield ( 6 ) and adapted to co-operate with each other to secure the shield ( 6 ) to the respirator ( 2 ), when the respirator is in its use position on the user's face, the first ( 32 ) and second ( 56 ) lock elements being adapted to be mutually engaged and interlocked by a movement bringing the shield ( 6 ) closer to the respirator ( 2 ), from above.