A work vehicle of the present invention includes a connection mechanism connecting ends of a first pipe and the second pipe. The connection mechanism includes a plate-shaped first joint member provided at the end of the first pipe, a plate-shaped second joint member provided at the end of the second pipe, and a coupling bolt coupling the first joint member and the second joint member to each other. The first joint member and the second joint member each have a coupling hole into which the coupling bolt is insertable, at a position exposed from the corresponding first or second pipe, and the first joint member and the second joint member are coupled to each other by the coupling bolt passed through the coupling holes while the plate surfaces of the first joint member and the second joint member overlap each other.