Abstract: Breathing assembly for aircraft, comprising: breathing equipment for supplying breathing gas to a user, comprising: a breathing mask comprising a rigid support and a shell attached to the rigid support, a harness, a strap having a connecting portion attached to the harness, a retaining member attached to a retaining portion of the strap, a storage unit comprising: a housing having an opening, and a closure device comprising at least one door, a biasing device able to act on the door to move it away from the opening when the closure device is in the closed position, and an engagement part able to engage with the retaining member to oppose the action of the biasing device and hold the closure device in the closed position, when the breathing equipment is in its stored position.