A control device for a vehicle gearbox, comprising: - a support casing, - a control lever pivotally mounted about an oscillation axis within said support casing and having an upper portion projecting from the support casing and carrying a lever handle, - a pivoting body rotatably mounted within said support casing about said oscillation axis and connected in rotation with said control lever about said oscillation axis, a connecting member for connection of one end of a gearbox control cable, said connecting member being connected to said pivoting body, wherein said connecting member is connected to said pivoting body by means of at least one adapter element, and wherein said adapter element and said pivoting body are configured so that they can be coupled with each other in different relative positions, so as to create different positions and/or different orientations of the control cable with respect to the pivoting body, said control device being characterized in that said adapter element has a body including: - a first end portion received in a seat of the pivoting body, for connecting the adapter element on the pivoting body, and - a second end portion, connected to said connecting member, and in that said first end portion and said second end portion can be reversed in position with each other, so that said second end portion is received in said seat of the pivoting body and said first end portion is instead connected to said connecting member, and in that said first end portion and said second end portion of the adapter element are offset relative to each other transversely to a longitudinal direction of said connecting element which goes from said first end portion to said second end portion, so that the relative position of the connecting member with respect to the pivoting body is different according to which of the first end portion and the second end portion of said adapter element is engaged in said seat. - a support casing, - a control lever pivotally mounted about an oscillation axis within said support casing and having an upper portion projecting from the support casing and carrying a lever handle, - a pivoting body rotatably mounted within said support casing about said oscillation axis and connected in rotation with said control lever about said oscillation axis, - a first end portion received in a seat of the pivoting body, for connecting the adapter element on the pivoting body, and - a second end portion, connected to said connecting member, and in that said first end portion and said second end portion can be reversed in position with each other, so that said second end portion is received in said seat of the pivoting body and said first end portion is instead connected to said connecting member, and in that said first end portion and said second end portion of the adapter element are offset relative to each other transversely to a longitudinal direction of said connecting element which goes from said first end portion to said second end portion, so that the relative position of the connecting member with respect to the pivoting body is different according to which of the first end portion and the second end portion of said adapter element is engaged in said seat.