PURPOSE: To realize the crablike side crawl movement of an elevation work vehicle in a state in which the direction of the elevation work vehicle coincides with a side shifting direction at all times, on an approach road leading to a building that is an object of construction, by conducting the linkage and connection of a turning force giving mechanism for pointing a side shifting direction and a drive wheel side shifting action mechanism.

CONSTITUTION: A drive wheel side shifting action mechanism 27 which is composed of a drive turning shaft 21 inserted from the side direction of the head part of a front piston rod 45 and a drive wheel 65, and a drive motor 61 to give turning force to the drive wheel 65, is provided. Next, turning movement is made by means of a pressurizing fluid that has made outer contact with a partition member and has been run into a pipe body, and at the same time connection is made attachable/detachable to/from a rear piston rod 49. A turning force giving mechanism 3 for pointing a side shifting direction which is composed of a turning shaft 21 that turns the rear piston rod 49 on the same axis and contains a brake device, is provided. The crablike side crawl movement of an elevation work vehicle becomes possible by conducting the linkage and connection of this turning force giving mechanism 3 for pointing a side shifting direction and the drive wheel side shifting action mechanism 27.