System for driving tools for agricultural machines comprising a first half-frame supporting tools, moving by translation between a working position in alignment with a second half-frame provided with tools (9, 11) pivoting between the working position and a transport position in which the second half-frame is positioned above the first half-frame, the tools (9, 11) mounted in each frame being driven by at least one means disposed at the outer end of at least one of the half-frames when these are in their working position, the first half-frame being mounted for translation on a device with an oscillating frame, comprising a hitching frame secured to the agricultural machine and an intermediate frame allowing angular movements in relation to the frame secured to the machine in a longitudinal axis of rotation and parallel to the axis of symmetry of the machine, the driving system being characterised in that it comprises: - a device for transmission of the drive from the driving unit of the agricultural machine to a driving shaft for the driving means for the tools disposed at the end of the pivoting half-frame, when the half-frame is moved into position pivoting from its retracted position to its extended working position, the transmission device including at least one transmission shaft mounted on the upper or lower part of the intermediate frame, - a shaft for transmission of the drive between a driving means disposed at the outer end of the half-frame which pivots and the driving means disposed at the outer end of the half-frame which moves by translation, when the half-frame is moved into position pivoting from its retracted position to its extended working position, this transmission shaft being either positioned in the upper or lower part of each half-frame (1a, 1b), or positioned in the upper or lower part of the intermediate frame where at least one portion of the transmission shaft coincides with the driving shaft for the driving means for the tools disposed at the end of the pivoting half-frame and the transmission shaft mounted on the upper or lower part of the intermediate frame. - a device for transmission of the drive from the driving unit of the agricultural machine to a driving shaft for the driving means for the tools disposed at the end of the pivoting half-frame, when the half-frame is moved into position pivoting from its retracted position to its extended working position, the transmission device including at least one transmission shaft mounted on the upper or lower part of the intermediate frame, - a shaft for transmission of the drive between a driving means disposed at the outer end of the half-frame which pivots and the driving means disposed at the outer end of the half-frame which moves by translation, when the half-frame is moved into position pivoting from its retracted position to its extended working position, this transmission shaft being either positioned in the upper or lower part of each half-frame (1a, 1b), or positioned in the upper or lower part of the intermediate frame where at least one portion of the transmission shaft coincides with the driving shaft for the driving means for the tools disposed at the end of the pivoting half-frame and the transmission shaft mounted on the upper or lower part of the intermediate frame.