The present invention relates to a stable antibody-containing liquid preparation which rarely undergoes the formation of aggregates of Emicizumab (ACE910) that is a bispecific antibody having a function alternative to the function of FVIII. More specifically, the present invention relates to the aforementioned antibody-containing liquid preparation which contains 20 to 180 mg/mL of the aforementioned bispecific antibody, 10 to 40 mM of a histidine-aspartate buffer solution, 0.2 to 1 mg/mL of Poloxamer 188 and 100 to 300 mM of arginine and has a pH value of 4.5 to 6.5.
