Door system for aircraft fuselage, the system comprising: - a door frame delimiting an opening in the fuselage, the opening giving access to a compartment of the aircraft; - a door provided to block the opening when the door occupies a closed position, this closed position of the door being intended to be maintained by pressure difference between the outside of the fuselage and the compartment; - stop means arranged at a periphery of the door, and intended to press on complementary stop means (26, 29) provided on the door frame, the system comprising also a door control device configured to bring the door from its closed position into a set-back intermediate position by moving the door towards the interior of the compartment and, vice versa, by moving the door outward, the stop means comprising a plurality of mobile stop members following each other along the periphery of the door, the system comprising also a stop means control device configured such that, when the door occupies its set-back intermediate position, a movement is provoked of the mobile stop members from a deployed locking position to a retracted unlocking position allowing the door to be moved outward through the opening in the fuselage, the system being configured so that, in the closed position of the door, the pressing of the mobile stop members, against the complementary stop means (26, 29) of the door frame, prevents these mobile members from being moved to their retracted unlocking position, characterized in that the stop means control device comprises: - an actuation membrane arranged at the periphery of the door and cooperating with the mobile stop members, the membrane delimiting a control chamber; and - pressure control means for the control chamber, the pressure inside the chamber conditioning the position of the membrane and that of the mobile stop members cooperating with this membrane. - a door frame delimiting an opening in the fuselage, the opening giving access to a compartment of the aircraft; - a door provided to block the opening when the door occupies a closed position, this closed position of the door being intended to be maintained by pressure difference between the outside of the fuselage and the compartment; - stop means arranged at a periphery of the door, and intended to press on complementary stop means (26, 29) provided on the door frame, the system comprising also a door control device configured to bring the door from its closed position into a set-back intermediate position by moving the door towards the interior of the compartment and, vice versa, by moving the door outward, the stop means comprising a plurality of mobile stop members following each other along the periphery of the door, the system comprising also a stop means control device configured such that, when the door occupies its set-back intermediate position, a movement is provoked of the mobile stop members from a deployed locking position to a retracted unlocking position allowing the door to be moved outward through the opening in the fuselage, the system being configured so that, in the closed position of the door, the pressing of the mobile stop members, against the complementary stop means (26, 29) of the door frame, prevents these mobile members from being moved to their retracted unlocking position, characterized in that the stop means control device comprises: - an actuation membrane arranged at the periphery of the door and cooperating with the mobile stop members, the membrane delimiting a control chamber; and - pressure control means for the control chamber, the pressure inside the chamber conditioning the position of the membrane and that of the mobile stop members cooperating with this membrane. - an actuation membrane arranged at the periphery of the door and cooperating with the mobile stop members, the membrane delimiting a control chamber; and - pressure control means for the control chamber, the pressure inside the chamber conditioning the position of the membrane and that of the mobile stop members cooperating with this membrane.