Provided is a recombinant monoclonal antibody-containing liquid pharmaceutical agent which can realize the stability of dimer formation inhibition and deamidation inhibition during long-term storage and is suitable for a wide range of antibody concentration. A recombination monoclonal antibody-containing liquid pharmaceutical agent comprises 10 mg/ml ~ 200 mg/ml recombinant monoclonal antibody and 40 mM ~ 94 mM amino acid components having histidine component of less than 5 mM and has a pH value of 5.5 to 7.0. Furthermore, the amino acid components other than the histidine component have at least one component selected from the group consisting of arginine, arginine hydrochloride and methionine.
