The present invention provides an air compressor having inflating and aerosol spraying functions for tires. The air compressor has an innovative actuator with an eccentric cam so that the present invention can not only perform singly inflating function for the flat tire but also perform fixing function for the rupture tire. The present invention comprises a case containing an air compressor and a tire fixing aerosol containing chemical sol therein with an actuator, which enables the present invention to shift the operation of the air compressor and tire fixing aerosol between the singly inflating and fixing functions for tire with easy manipulation.