Breathing assembly for aircraft

A breathing assembly for aircraft comprising:

• a breathing mask to be connected to a source of breathing gas,
• a stowage box forming a receptacle for receiving the breathing mask in a stowage position, said stowage box having an opening for extracting the breathing mask from the stowage box, and
• a valve assembly comprising a valve having an open position in which the valve allows the feed of breathing gas to the breathing mask and a closed position in which the valve prevents the feed of breathing gas to the breathing mask, the valve being automatically positioned in the open position when the breathing mask is extracted from the stowage box,
• wherein the valve assembly is supported by the breathing mask and the breathing assembly further comprises a retaining element which is connected to the stowage box and cooperates with the valve assembly to maintain the valve in the closed position when the breathing mask is in the stowage position, wherein
• the valve assembly comprises a casing in which the valve slides along a sliding direction between the open position and the closed position,
• the casing has at least one slot, and
• in the stowage position, the retaining element is inserted in the slot and the valve abuts an abutment surface of the retaining element extending perpendicularly to the sliding direction.