Wheel speed sensor for vehicle

A vehicle wheel speed sensor is provided to improve reliability of a sensor by using a protective cover of a simple structure in order to protect a tone wheel. A vehicle wheel speed sensor includes a tone wheel(400), a sensing unit(500), and a cover member(600). The tone wheel is mounted on a hub bearing in order to be rotated together with a wheel. A plurality of slots(410) are formed at the tone wheel in order to cause a change of a magnet(520). An air gap is formed between the sensing unit and the tone wheel in order to sense an operation of the tone wheel and to transmit a sensing signal to a control unit. The cover member is fixed to the hub bearing. The tone wheel is inserted into the cover member in order to be protected.