Abstract: A telescopic stay for two objects which can be folded relative to one another, particularly for supporting a work surface which can be folded in relation to a frame structure. The stay includes two tubes 6, 7 which can be telescoped one within the other and which are intended for pivotal connection at mutually opposite ends thereof to a respective one of said objects, and further includes an inner guide tube 8 arranged in the telescopic tubes, a tension spring 15 which extends axially through all tubes, and a locking means 9 for releasably locking the telescopic tubes in a given working position relative to one another. To facilitate mounting of the stay, the inner guide tube is fixed axially in relation to one telescopic tube and accompanies the movement of this tube in relation to the other telescopic tube.