PURPOSE: To move a plurality of moving bodies independently of each other by successively providing a plurality of two-dimensional motion mechanisms in which the moving body is moved to an arbitrary position in a single plane.

CONSTITUTION: A slider 14 of the first two-dimensional motion mechanism 10 can be moved to an arbitrary position in a square plane 16, and a slider 18 of the second two-dimensional motion mechanism 12 can be moved to an arbitrary position in a square plane 20. The two-dimensional motion mechanisms 10, 12 are successively connected in line with each other, and base beds 22, 24 are connected so as to be formed substantially as an integral unit through a connecting tool 26 by setting up the first two-dimensional motion mechanism 10 on the base bed 22 and the second two-dimensional motion mechanism 12 on the base bed 24. In such a way as mentioned, touring action or the like, followed by complicated movement, can be performed when a tool, robot head, workpiece, etc., are mounted to a moving body because a plurality of the moving bodies can be moved independently of each other.