a machine tool has a cover structure adapted for the discharge of chips . the cover is composed of a front cover , left and right side covers , and a bottom part . the bottom part is connected to a bed through the respective lower ends of the front cover and the side covers . further , at least a part of the bottom part includes a slope gradually inclining from the side connected to the bed toward the outer periphery . even if the chips produced during machining adhere to members inside the cover , they are washed away by a cutting fluid and discharged into a cutting fluid supply device through a channel located farthest from the central portion of the machine tool .