An aircraft door comprising: - a leaf comprising a door structure, an external wall fixed to the door structure, and door stops; - a surround comprising a door frame intended to be fixed to the fuselage of the aircraft, the door frame comprising frame stops; - a support arm connected to the leaf and comprising one end mounted to pivot on the door frame, this support arm and the leaf being movable between: a closed position in which the leaf closes the door frame, the door stops being locked against the frame stops; an unlocking position in which the door stops are released from the frame stops; and an open position in which the leaf is disengaged from the door frame; - a locking/unlocking mechanism adapted to control the passage from the closed position to the unlocking position, and vice versa, this locking/unlocking mechanism comprising for its actuation an internal lever and an external lever, these levers (15,19) being mounted on the door structure and being movable between a locking position and an unlocking position; the locking/unlocking mechanism comprises: - a control shaft extending along a substantially vertical axis, the control shaft being mounted on the door structure in a pivot connection around the axis of the control shaft, the internal lever and the external lever being connected to the control shaft while extending transversely to the control shaft so that an action on one of the levers (15,19) causes the control shaft to rotate about its axis; - a guide track extending in a plane substantially orthogonal to the control shaft; - an actuating finger fixed to the support arm, this actuating finger being adapted to cooperate with the guide track; - a mechanical transmission adapted to cause a movement of the actuating finger when the control shaft is actuated in rotation; the locking/unlocking mechanism has: - an actuation configuration corresponding to the angular travel of the levers (15,19) between their locking position and their unlocking position, in which configuration the actuating finger is inserted into the guide track, the rotation of the control shaft causing a movement of the actuating finger along the guide track; - a release configuration in which the levers (15,19) are in the unlocked position, in which configuration the actuating finger is movable between a first position and a second position where the leaf then being in the open position. This aircraft door being characterised in that: - the inner lever and the outer lever are connected to the control shaft by extending transversely to the control shaft; - the guide track has an opening at its end; - the actuating finger is arranged in a first position at the opening of the guide track, and - the actuating finger is arranged in a second position outside the guide track. - a leaf comprising a door structure, an external wall fixed to the door structure, and door stops; - a surround comprising a door frame intended to be fixed to the fuselage of the aircraft, the door frame comprising frame stops; - a support arm connected to the leaf and comprising one end mounted to pivot on the door frame, this support arm and the leaf being movable between: a closed position in which the leaf closes the door frame, the door stops being locked against the frame stops; an unlocking position in which the door stops are released from the frame stops; and an open position in which the leaf is disengaged from the door frame; - a locking/unlocking mechanism adapted to control the passage from the closed position to the unlocking position, and vice versa, this locking/unlocking mechanism comprising for its actuation an internal lever and an external lever, these levers (15,19) being mounted on the door structure and being movable between a locking position and an unlocking position; - a control shaft extending along a substantially vertical axis, the control shaft being mounted on the door structure in a pivot connection around the axis of the control shaft, the internal lever and the external lever being connected to the control shaft while extending transversely to the control shaft so that an action on one of the levers (15,19) causes the control shaft to rotate about its axis; - a guide track extending in a plane substantially orthogonal to the control shaft; - an actuating finger fixed to the support arm, this actuating finger being adapted to cooperate with the guide track; - a mechanical transmission adapted to cause a movement of the actuating finger when the control shaft is actuated in rotation; - an actuation configuration corresponding to the angular travel of the levers (15,19) between their locking position and their unlocking position, in which configuration the actuating finger is inserted into the guide track, the rotation of the control shaft causing a movement of the actuating finger along the guide track; - a release configuration in which the levers (15,19) are in the unlocked position, in which configuration the actuating finger is movable between a first position and a second position where the leaf then being in the open position. - the inner lever and the outer lever are connected to the control shaft by extending transversely to the control shaft; - the guide track has an opening at its end; - the actuating finger is arranged in a first position at the opening of the guide track, and - the actuating finger is arranged in a second position outside the guide track.