Nacelle for a dual-flow turbojet engine, said nacelle comprising: - a structure, - a fixed cowl fixedly mounted on the structure, - a mobile cowl mounted to be translationally mobile on the structure in a direction of translation between a position of closure in which it is close to the fixed cowl and a position of opening in which it is away from the fixed cowl towards the rear, - a window delimited upstream by the fixed cowl and downstream by the mobile cowl, said window being open between a jet of a secondary flow and the outside of the nacelle, - an outer thrust-reversing door having a median plane (xZ) and mounted to be rotationally mobile about a first axis of rotation on the structure between a closed position in which it blocks the window and an open position in which it does not block the window, and - a driving mechanism provided to coordinate the transition from the closed position to the open position of the outer thrust-reversing door with the transition from the position of closure to the position of opening of the mobile cowl and vice-versa, said driving mechanism comprising: - a single power cylinder arranged at the level of the median plane (xZ), having a first end mounted articulated on the structure, - a shaft having an axis, called third axis of rotation, parallel to the first axis of rotation and at a distance therefrom, and where the second end of the power cylinder is mounted articulated on the shaft, - a first yoke joint secured to the outer thrust-reversing door and mounted to be free to rotate on the shaft about the third axis of rotation, and - a second yoke joint secured to the mobile cowl and where each of the two flanks of the second yoke joint has a groove in each of which the shaft is mounted to slide parallel to the median plane. - a structure, - a fixed cowl fixedly mounted on the structure, - a mobile cowl mounted to be translationally mobile on the structure in a direction of translation between a position of closure in which it is close to the fixed cowl and a position of opening in which it is away from the fixed cowl towards the rear, - a window delimited upstream by the fixed cowl and downstream by the mobile cowl, said window being open between a jet of a secondary flow and the outside of the nacelle, - an outer thrust-reversing door having a median plane (xZ) and mounted to be rotationally mobile about a first axis of rotation on the structure between a closed position in which it blocks the window and an open position in which it does not block the window, and - a driving mechanism provided to coordinate the transition from the closed position to the open position of the outer thrust-reversing door with the transition from the position of closure to the position of opening of the mobile cowl and vice-versa, said driving mechanism comprising: - a single power cylinder arranged at the level of the median plane (xZ), having a first end mounted articulated on the structure, - a shaft having an axis, called third axis of rotation, parallel to the first axis of rotation and at a distance therefrom, and where the second end of the power cylinder is mounted articulated on the shaft, - a first yoke joint secured to the outer thrust-reversing door and mounted to be free to rotate on the shaft about the third axis of rotation, and - a second yoke joint secured to the mobile cowl and where each of the two flanks of the second yoke joint has a groove in each of which the shaft is mounted to slide parallel to the median plane. - a single power cylinder arranged at the level of the median plane (xZ), having a first end mounted articulated on the structure, - a shaft having an axis, called third axis of rotation, parallel to the first axis of rotation and at a distance therefrom, and where the second end of the power cylinder is mounted articulated on the shaft, - a first yoke joint secured to the outer thrust-reversing door and mounted to be free to rotate on the shaft about the third axis of rotation, and - a second yoke joint secured to the mobile cowl and where each of the two flanks of the second yoke joint has a groove in each of which the shaft is mounted to slide parallel to the median plane.