Balance car

The utility model belongs to the technical field of traffic, and particularly relates to a balance car which comprises a car body and wheels arranged on the left side and the right side of the car body respectively, idler wheel mechanisms are arranged on the front side and the rear side of the car body respectively, and a telescopic driving mechanism is arranged between each idler wheel mechanismand the car body. The roller mechanisms are arranged on the front side and the rear side of the vehicle body respectively, the telescopic driving mechanisms are arranged between the roller mechanismsand the vehicle body, the roller mechanisms can be controlled to stretch out and draw back through the telescopic driving mechanisms, free switching of the balance vehicle between two wheels and fourwheels can be achieved, purchase increasing and stability enhancing can be used for object carrying and the like during four-wheel driving, and the application range is expanded. The balance car solves the problems that an exis