To provide a load carrying platform rear part side opening range expansion type wing vehicle structured free to effectively revolve left and right wings by cylinders on a front wall side without increasing the number of beam members at its front wall upper part and without providing a special sealing means.

This wing vehicle is constituted by mounting a center beam bracket 20 fixed on a front wall side end part of a center beam 12 bridging a front wall of a load carrying platform and a top part of a rear wall to each other on a lower part mounting bracket 38L in a front header 24 provided on a front wall upper part so that the center beam 12 can revolve in the vertical direction, providing the front part cylinder 22L for wing revolution between the center beam bracket 20 and the left and right wings and respectively providing the cylinder for elevation to elevate a rear header on which the center beam 12 is mounted and the rear part cylinder for wing revolution to open and close the left and right wings on the load carrying platform rear wall side.