TRANSPORT VEHICLE

A transport vehicle includes a pair of left and right vehicle body frames extending in a front and back direction; driving wheels disposed at a middle portion in the front and back direction of the pair of left and right vehicle body frames; auxiliary wheels disposed at a lower portion of an end portion in the front and back direction of each of the right and left vehicle body frames; lifter mechanisms disposed at an upper portion of an end portion in the front and back direction of each of the right and left vehicle body frames; a connection frame connecting upper portions of the right and left vehicle body frames to each other; and a lower frame disposable between the right and left vehicle body frames, the lower frame being removably fixed at lower portions of the right and left vehicle body frames.