To provide a wagon for sales in a vehicle provided with a brake device in which a waste rubber is not dropped off on a floor surface when a caster is braked and rolling of the caster can be certainly braked even if the total weight of the wagon is relatively large.

The wagon 1 for sales in the vehicle includes longitudinal directions X, Y, a load-carrying platform 2; a pair of casters 3a, 3a, 3b, 3b mounted to the front side X and the rear side Y on a bottom surface of the load-carrying platform 2; and the brake device 6 for braking at least the casters 3b, 3b positioned at the rear side of the casters 3a, 3a, 3b, 3b. The brake device is an inner enlargement type drum brake device 6 including a circular drum 13 integrally rotated with the casters 3b, 3b; and a brake action part for braking the casters 3b, 3b by abutting it on an inner peripheral surface 13a of the drum 13.