An aircraft door having a door structure, an external wall fixed to the door structure, and a lever for emergency opening from the outside, which is disposed in a lever window formed in the external wall, this lever for emergency opening from the outside having: • a main arm provided at one of its ends with a handle and at the other one of its ends with an opening-movement transmission shaft, this transmission shaft being fixed with respect to the main arm, the main arm having a first aerodynamic surface extending from the handle to the transmission shaft, the transmission shaft being mounted so as to be pivotable on the door structure in such a way that the main arm can be moved between two positions: - a retracted position, in which the first aerodynamic surface is disposed in the contours of the lever window, in the continuation of the external wall; - a deployed position, in which the main arm is outside the lever window, this deployed position corresponding to a configuration of activation of the emergency opening from the outside; • a profiled cowl having a second aerodynamic surface, this profiled cowl being mounted so as to be pivotable between: - a concealing position, in which the second aerodynamic surface is aligned in the continuation of the first aerodynamic surface; - a swung-out position, in which the second aerodynamic surface is folded in the direction of the first aerodynamic surface; this aircraft door being characterized in that: • the profiled cowl is mounted to be pivotable on the main arm, and in that the opening lever further comprises: • a driving abutment suitable for rotating the profiled cowl from its concealing position into its swung-out position when the main arm moves from its retracted position to its deployed position. • a main arm provided at one of its ends with a handle and at the other one of its ends with an opening-movement transmission shaft, this transmission shaft being fixed with respect to the main arm, the main arm having a first aerodynamic surface extending from the handle to the transmission shaft, the transmission shaft being mounted so as to be pivotable on the door structure in such a way that the main arm can be moved between two positions: - a retracted position, in which the first aerodynamic surface is disposed in the contours of the lever window, in the continuation of the external wall; - a deployed position, in which the main arm is outside the lever window, this deployed position corresponding to a configuration of activation of the emergency opening from the outside; - a retracted position, in which the first aerodynamic surface is disposed in the contours of the lever window, in the continuation of the external wall; - a deployed position, in which the main arm is outside the lever window, this deployed position corresponding to a configuration of activation of the emergency opening from the outside; • a profiled cowl having a second aerodynamic surface, this profiled cowl being mounted so as to be pivotable between: - a concealing position, in which the second aerodynamic surface is aligned in the continuation of the first aerodynamic surface; - a swung-out position, in which the second aerodynamic surface is folded in the direction of the first aerodynamic surface; - a concealing position, in which the second aerodynamic surface is aligned in the continuation of the first aerodynamic surface; - a swung-out position, in which the second aerodynamic surface is folded in the direction of the first aerodynamic surface; • the profiled cowl is mounted to be pivotable on the main arm, and in that the opening lever further comprises: • a driving abutment suitable for rotating the profiled cowl from its concealing position into its swung-out position when the main arm moves from its retracted position to its deployed position. • a driving abutment suitable for rotating the profiled cowl from its concealing position into its swung-out position when the main arm moves from its retracted position to its deployed position.