PURPOSE: To make it possible to secure a table at an arbitrary angle, by supporting one end side of the table, tiltably to a fulcrum shaft, and by supporting the other end side of the table tiltably to a horizontal support shaft which is parallel with the fulcrum shaft.

CONSTITUTION: When an NC motor 24 is driven, a worm, 25 is rotated, and therefore, a feed nut 22 is rotated by means of a worm wheel 23, resulting in that a feed screw 17 is fed upward relative to a gear casing 21, and a table device 12 tilts about a fulcrum shaft 15 as a center so that a rotary table 31 is inclined. At this time the feed screw 17, the gear casing 21 and a hydraulic cylinder 19 are turned about a cylinder support shaft 20 as a fulcrum. After the table device 12 is inclined to a predetermined angle, hydraulic oil is fed into an upper cylinder chamber 19a in the hydraulic cylinder 19 to apply a force to a piston 18, and therefore, the gear casing 21 is secured to a carrier 26 through the intermediary of the feed nut 22.