An emergency opening device for an aircraft door fitted with an opening mechanism, comprising: - actuating means (2, 5) designed to actuate the opening mechanism, which can switch between a passive state and an active state of activating the opening mechanism, and which comprise: a tubular operating member provided with a first end designed to be connected to the door, and with a locking second end; elastic compression means arranged between a fixed end-stop element and the operating member; a retainer for restraining the locking second end, able to move between a closed position of locking of the locking second end, in a position of the operating member corresponding to the passive state of the actuating means in which position the elastic means are kept compressed, and an open position of releasing of the locking second end allowing the operating member to move along an axis of movement toward a position corresponding to the active state of the actuating means, under the effect of the force resulting from the expansion of the elastic means; - activating means for activating the actuating means (2, 5) designed to bring about the opening of the retainer; this emergency opening device being characterized in that: - the operating member has a radial retaining finger on its locking second end; - the retainer comprises a hook which has a stop surface, the retainer being able to rotate about the axis of movement between its closed position, in which the stop surface is in contact with the radial retaining finger to lock the locking second end, and its open position, in which the stop surface is away from the radial retaining finger. - actuating means (2, 5) designed to actuate the opening mechanism, which can switch between a passive state and an active state of activating the opening mechanism, and which comprise: a tubular operating member provided with a first end designed to be connected to the door, and with a locking second end; elastic compression means arranged between a fixed end-stop element and the operating member; a retainer for restraining the locking second end, able to move between a closed position of locking of the locking second end, in a position of the operating member corresponding to the passive state of the actuating means in which position the elastic means are kept compressed, and an open position of releasing of the locking second end allowing the operating member to move along an axis of movement toward a position corresponding to the active state of the actuating means, under the effect of the force resulting from the expansion of the elastic means; - activating means for activating the actuating means (2, 5) designed to bring about the opening of the retainer; this emergency opening device being characterized in that: - the operating member has a radial retaining finger on its locking second end; - the retainer comprises a hook which has a stop surface, the retainer being able to rotate about the axis of movement between its closed position, in which the stop surface is in contact with the radial retaining finger to lock the locking second end, and its open position, in which the stop surface is away from the radial retaining finger. - the operating member has a radial retaining finger on its locking second end; - the retainer comprises a hook which has a stop surface, the retainer being able to rotate about the axis of movement between its closed position, in which the stop surface is in contact with the radial retaining finger to lock the locking second end, and its open position, in which the stop surface is away from the radial retaining finger.