To guide and move an air-floating type conveying truck along a moving direction without deviation.
The bottom of a loading plate 2 of an air-floating type conveying truck 1 is partitioned by a side wall 3, a center chamber 4 is formed on the center part of the bottom, and outer chambers 5 are formed on a peripheral portion of the bottom. When compressed air is supplied from an air supply device 10 into the center chamber 4 and the outer chambers 5, the air-floating type conveying truck 1 floats to move the truck 1. By the aid of guide mechanisms 20 on both sides, the air-floating type conveying truck 1 moves in the moving direction while being guided. Accordingly, the air-floating type conveying truck 1 moves without deviating in the other direction.