Arbeitsfahrzeug

The present invention concerns a working vehicle, comprising gear shaft which is put in gear box (28) and rotates in association with change of gear lever (35), a couple of left and right sliders, which are designed to slide on the gear shaft along its axial line, a couple of left and right speed changing means (26,27) which are linked to said left and right sliders and used to drive left and right crawlers, handle (32) which is provided to said gearbox (28) so as to freely rotate and main slider which is slid by rotating said handle and thereby makes said sliders slide, characterized in that said gear shaft and said left and right sliders are moved in one body by manipulating said gear lever (35) in order that said speed changing means (26,27) may be switched to direct to the same direction at the same time and make said crawlers go straight forward or backward and that either one of said left and right sliders slid by said main slider (53) is put in such position by turning said handle (32) as to stop or to move said one of said crawlers in the reverse direction to turn said working vehicle.