A control device for a vehicle gearbox includes a support casing and a control lever pivotally mounted about an oscillation axis within said support casing. A pivoting body is rotatably mounted within the support casing about the oscillation axis of the control lever and is connected in rotation with the control lever. A connecting member for a gearbox control cable is connected to the pivoting body by an adapter element. The adapter element and the pivoting body are configured so they can be coupled with each other in different relative positions, in order to create different positions and/or different orientations of the control cable with respect to the pivoting body.