Breathing assembly for aircraft, comprising: - breathing equipment for supplying breathing gas to a user, comprising: • a breathing mask, the breathing mask comprising a rigid support and a shell (14, 17) attached to the rigid support, the shell (14, 17) having a breathing cavity (13, 15) and being adapted for application to the user's face around the user's mouth and nose, • an inflatable harness adapted to extend around the user's head opposite the shell in order to hold the shell on the user's face, • a strap having a gripping portion and a connecting portion, the connecting portion being attached to the harness, - a storage unit comprising: • a housing adapted to receive the breathing equipment in a stored position, said housing having an opening, and • a closure device comprising at least one door (52; 54) having an inner face (52a; 54a) and an outer face (52b; 54b), the closure device being movable between a closed position where the closure device at least partially closes the opening and an open position where it is at least partially clear of the opening, said breathing assembly being characterized in that: - the storage unit further comprises a biasing device able to act on the door (52; 54) to move the door (52; 54) away from the opening when the closure device is in the closed position, - the breathing equipment further comprises a retaining member attached to a retaining portion of the strap, - the storage unit comprises an engagement part adapted 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 the stored position. - breathing equipment for supplying breathing gas to a user, comprising: • a breathing mask, the breathing mask comprising a rigid support and a shell (14, 17) attached to the rigid support, the shell (14, 17) having a breathing cavity (13, 15) and being adapted for application to the user's face around the user's mouth and nose, • an inflatable harness adapted to extend around the user's head opposite the shell in order to hold the shell on the user's face, • a strap having a gripping portion and a connecting portion, the connecting portion being attached to the harness, • a breathing mask, the breathing mask comprising a rigid support and a shell (14, 17) attached to the rigid support, the shell (14, 17) having a breathing cavity (13, 15) and being adapted for application to the user's face around the user's mouth and nose, • an inflatable harness adapted to extend around the user's head opposite the shell in order to hold the shell on the user's face, • a strap having a gripping portion and a connecting portion, the connecting portion being attached to the harness, - a storage unit comprising: • a housing adapted to receive the breathing equipment in a stored position, said housing having an opening, and • a closure device comprising at least one door (52; 54) having an inner face (52a; 54a) and an outer face (52b; 54b), the closure device being movable between a closed position where the closure device at least partially closes the opening and an open position where it is at least partially clear of the opening, • a housing adapted to receive the breathing equipment in a stored position, said housing having an opening, and • a closure device comprising at least one door (52; 54) having an inner face (52a; 54a) and an outer face (52b; 54b), the closure device being movable between a closed position where the closure device at least partially closes the opening and an open position where it is at least partially clear of the opening, - the storage unit further comprises a biasing device able to act on the door (52; 54) to move the door (52; 54) away from the opening when the closure device is in the closed position, - the breathing equipment further comprises a retaining member attached to a retaining portion of the strap, - the storage unit comprises an engagement part adapted 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 the stored position.