A carrier mounting structure, in which knobs for connecting a lower frame of a carrier to a bumper cover are formed integrally with the lower frame so that a connection step between the knobs and the lower frame is omitted, thereby decreasing the number of steps of an overall assembly process and reducing the production cost of the carrier. The carrier mounting structure comprises a carrier provided in front of an engine compartment of a car body for fixing electric components of a car, a bumper cover located below the carrier for absorbing impact generated in external collision, and a plurality of knobs extended from a lower surface of the carrier and connected to the bumper cover, wherein the knobs are formed integrally with the carrier.
