The stable liquid formulation according to the present invention contains an antibody or an antigen binding portion; acetate buffer; glycine; and surfactant; does not contain one or more of sugars, sugar alcohols, and metal salts, and is stable even in the case of containing antibodies with high content and excellent in permeability and viscosity Subcutaneous administration is possible.No selection本発明に係る安定した液体製剤は、抗体またはその抗原結合部分;酢酸塩緩衝液;グリシン;および界面活性剤を含み、糖、糖アルコール、および金属塩のうちの1つ以上を含まず、抗体を高含有量で含む場合でも安定し、浸透質濃度および粘度の面で優れ、皮下投与が可能である。【選択図】なし