Abstract: A device for fixing the wish-bone of a sail-board to the mast of this sail-board in a fast and easy manner. The device comprises a U-shaped element intended to be connected to the mast, this element having two sleeve-shaped ends in which are inserted both arms of the wish-bone. A column-shaped, mast-engaging body is provided to connect the U-shaped element to the mast. This body has a bearing surface against which the mast may engage. A lever-operated, hook-clamping system is mounted on both sides of the bearing surface of the body to fix this body to the mast after the mast has been positioned against the bearing surface, such a fixation providing the requested connecting of the U-shaped element and wish-bone attached thereto to the mast. This device is particularly interesting in that it considerably simplifies the relatively delicate installation of the wish-bone onto the mast of a sail-board.