To effectively cool a loom by arranging a water passage for making cooling water flow in the loom.

An oil tank 21 is attached to the outside of a side frame 13. A lubricating oil U is put in the oil tank 21. The lubricating oil U in the oil tank is fed into a right-side drive box 19 and a left-side drive box 20 by operation of a pump 22. The lubricating oil for lubricating parts required for lubrication of each of drive mechanisms in the right-side drive box 19 and the left-side drive box 20 is returned through returning pipes 27 and 28 to the oil tank 21. A cooling pipe 29 is passed through the interior of the oil tank 21. The cooling water fed from a feed source 30 of the cooling water is led into the oil tank 21 by the cooling pipe 29.