To facilitate mode switching of a liquid crystal display part and to avoid inconvenience to change important setting due to maloperation by a user.

A tractor is furnished with the liquid crystal display part 38 to be displayed and moved by a plurality of display modes and a plurality of scope operation switches SW1 to SW4 to carry out scope operation of the liquid crystal display part 38 in the inside of or in the neighborhood of a meter panel 32 in front of a driver's seat 28 and a side panel 29 on which a plurality of operation tools are arranged on the side of the driver's seat 28, and a display mode switching dial 30 is arranged on the side panel 29 in switching the display mode of the liquid crystal display part 38 in accordance with operation of the display mode switching dial 30.