To provide a traveling work vehicle capable of running by utilizing feature of a crawler type travel device when advancing straight and running with less damage to field surface and turf surface due to sideslip which is shortcoming of the crawler type travel device when turning.

This travel work vehicle is provided with a plurality of sets of pairs of left and right crawler type travel devices 12, 12 in the forward and backward directions. Each crawler type travel device 12 is constituted into a triangular shape when viewed on side, and a drive shaft 17 is arranged at an upper part vertex position. The crawler type travel devices 12 of each set are constituted so as to rotate around drive shaft axis.