The present invention relates to a human antibody specific for FcRn that is a receptor with a high affinity for IgG, a production method thereof, a composition for treating autoimmune disease, which comprises the antibody, and a method of treating and diagnosing autoimmune disease using the same. The FcRn-specific antibody according to the present invention can bind to FcRn non-competitively with IgG or the like to reduce serum auto-antibody levels, and thus can be used for the treatment of autoimmune diseases.
