Novel human CC chemokine LARC useful in the treatment and diagnosis for diseases related to inflammation and immunological reactions. Human CC chemokine LARC having an amino acid sequence consisting of the amino acid residues 27 to 96 in SEQ ID NO: 1; its structural gene; a process for producing the above-mentioned protein; vectors containing the DNA encoding the protein to be used in this process; transformants containing these vectors; medicinal compositions containing the above-mentioned protein or its structural gene; diagnostic drugs for the above-mentioned diseases; the monoclonal antibody of the above-mentioned protein; and hybridomas capable of producing the monoclonal antibody.