An assembly for an aircraft. The assembly comprises a frame, an instrument panel fixed to the frame, a support system with an arm bearing a tray in which the arm positions the tray behind the instrument panel, and in which the tray comprises a first attachment arrangement, and a support comprising a second attachment arrangement which cooperates with the first attachment arrangement to removably fix the support onto the tray. The support also comprises a fixing system which ensures the removable fixing of a touch tablet onto the support. With such an assembly, the touch tablet is held without the aid of the pilot and it is positioned in front of him or her for easy access.