The utility model relates to a car footboard of getting on or off the bus specifically is a footboard mounting structure gets on or off bus, including pedal support, footboard support chassis, pedal body and buffering connecting piece, pedal support includes the footboard mounting panel, footboard support chassis's cross -section and pedal body's cross -section are L shape, the buffering connecting piece includes bolt, flange sleeve and rubber packing ring, the telescopic one end of flange is equipped with the flange, and flange cover barrel casing is established in the outside of bolt, the rubber pad snare is established in the telescopic outside of flange, the bolt passes pedal body's longitudinal component, footboard support chassis's longitudinal component and footboard mounting panel and fixed through tighten nut in proper order, the rubber packing ring lies in between flange and the pedal body, the flange sleeve is located between bolt and the pedal body. The utility model discloses can alleviate pedal body's the bolt assembly point stress concentration of department to extension pedal body's life.