The present disclosure relates to a washing machine comprising: a cabinet; a tub which is accommodated in said cabinet, and accommodates wash water therein; a drum which is installed in said tub to be rotated, an accommodates the laundry; a sump which is equipped on the lower part of said tub such that the wash water is collected; a drain chamber which is connected to the lower part of a drain formed on a bottom surface of said sump, and in which the wash water drained from said drain is temporarily stored; a pump which circulates the wash water drained from said drain chamber; and a drain-side circulation flow path which forms a path in which the wash water circulates between said drain chamber and said pump.
