Disclosed herein is a detergent supply device including a drawer including a body having a first storage portion and a second storage portion, a first discharge valve configured to discharge a detergent from the first storage portion, and a second discharge valve configured to discharge a detergent from the second storage portion, a housing including a first chamber allowing the body to be withdrawably accommodated therein, a second chamber communicating with the first chamber, and a chamber discharge portion configured to discharge a material from the first chamber, a first flow passage for movement of water along a direction orthogonal to a withdrawal direction of the body, a second flow passage branching from the first flow passage, a first pump connected to the first discharge valve when the body is inserted into the first chamber, and a second pump connected to the second discharge valve when the body is inserted.