An turbocharger for a vehicle is provided. The turbocharger includes a shaft that has a hollow aperture at an inside thereof and an outer circumferential surface of the shaft includes an inlet aperture and an outlet aperture which communicate with the hollow aperture. A turbine wheel is integrally installed at the shaft and a hollow groove formed in the wheel communicates with the hollow aperture. A center housing includes a shaft groove in which the shaft is rotatably installed. The center housing includes an oil passage to which oil is supplied from an oil pipe, an air passage to which air is supplied from an air tank, and an injection passage extending to the shaft groove while being connected to the oil and air passages. An oil valve and an air valve are installed in the oil and air passages, respectively, to selectively open/close flow of a fluid.