This article aims to critically examine gender inequality in the domestic labor which is the biggest obstacle to building a gender equal society in the 21st century. Gender inequality in the domestic labor is basically attributable to gender division of labor. Gender division of labor neglects the socioeconomic value of domestic labor, and takes the unpaid domestic labor of women for granted. However, it is unavoidable that this trend cannot continue in an aging and low fertility society. This is because it contradicts to not only the various social systems but also to the basic directions of social policies in an aging and low fertility society. This article reviews the causes and actualities of gender inequality in the domestic labor with a focus on gender