PURPOSE: To enable truss frames to be erected without use of a crane by arranging an erection stage and a plurality of struts along a conveyer erecting line and advancing the truss frames on carrier rollers provided on the top of the struts while interconnecting successively the truss frames.

CONSTITUTION: Carrier rollers 11, 21 are arranged respectively on struts 2 erected on an erected stage 1 and a conveyer erecting line provided on a working base, and a traction unit 4 is arranged along the erection line. This traction unit 4 is constituted from an extruding mechanism 4a at the erection stage side and a drawing mechanism 4b at the opposite side. In the execution of the erection, a pilot frame 3 and a conveyer truss frame 3a interconnected in series are mounted on the erection stage 1 and advanced by a wire 41. When the frame 3 reaches the strut 2 in front of the erection stage, the advancement of the frame 3 is stopped and the truss frame 3b is connected to the rear of the frame 3a. Hereinafter, similar operations are repeated to complete a desired work.