PROBLEM TO BE SOLVED: To provide an antibody-containing formulation which is stable and suited for subcutaneous administration, wherein dimerization and deamidation are suppressed during long-term storage.SOLUTION: This stable antibody-containing formulation includes an antibody, 40-1,000 mM of arginine, and 10-200 mM of methionine in buffer solution, and generation of antibody dimer by optical acceleration is suppressed.COPYRIGHT: (C)2012,JPO&INPIT【課題】長期保存時の二量体生成や脱アミド化が抑制された、安定な、皮下投与に適した抗体含有製剤を提供する。【解決手段】抗体およびアルギニン40~1000mM及びメチオニン10~200mMを緩衝液中に含有し、光加速による抗体二量体の生成が抑制される、安定な抗体含有溶液製剤。【選択図】なし