A nacelle for a dual-flow turbojet engine comprises a structure, a fixed cowl, a cowl translationally mobile on the structure, a window open between a secondary jet and the outside of the nacelle, and delimited by the fixed and mobile cowls, an outer thrust-reversing door rotationally mobile and a driving mechanism. The driving mechanism comprises a single power cylinder arranged at the level of a median plane and having a first end mounted articulated on the structure, a shaft with the second end of the power cylinder mounted articulated on the shaft, a first yoke joint secured to the outer thrust-reversing door and free to rotate on the shaft, 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.
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