Abstract: A device for supporting the slay drive of a loom such device is especially advantageous in a high-speed loom with a great working width. Two transmission mechanisms are used, these being placed between the loom sides. The device has a housing assembly including a box having a center part, to both ends of which there are affixed gear boxes; to the opposite sides of the center part there are secured exchangeable terminal parts of the said box, the terminal parts being fixed to the sides of the loom. A main shaft is journalled in one of the terminal parts, in the adjacent gear box and in a portion of the center part, the main shaft being connected with a driven shaft in the center part by means of gears. The transmission mechanisms are mounted in the gear boxes, the transmission mechanisms being connected to a cross bar bearing swords upon which the slay is mounted.