A protective device comprising a band part to be arranged on the wearers head and a channel part arranged thereto and means for supplying air into the channel part and further through the end of the channel part to the wearers facial area. The protective device further comprises a connecting part provided with two branch parts to be arranged at the end of the channel part, the ends of the branch parts being arranged to be connected to air supply means arranged in the mask part covering the wearers mouth and nose.
