A laundry treating apparatus comprising: a cabinet with an inlet defined in one surface thereof; a main door pivotably disposed on the cabinet so as to open and close the inlet; a first chamber positioned inside the cabinet so as to accommodate therein laundry through the inlet; a first chamber top surface forming a top surface of the first chamber; a second chamber positioned inside the cabinet and at a lower portion of the cabinet to define a space separated from the first chamber; a dividing portion located inside the first chamber and extending in parallel with a first direction that is a height direction of the cabinet and a second direction that is a depth direction of the cabinet to divide the first chamber into one or more accommodation spaces; and a moving driver configured to adjust sizes of the one or more accommodation spaces by moving the dividing portion along a third direction that is a width direction of the cabinet, characterized in that the laundry treating apparatus further comprises: a plurality of cutout holes defined to extend through the first chamber top surface; a hanger assembly including a plurality of hangers respectively inserted into the plurality of cutout holes; and a hanger arranging portion positioned between the first chamber top surface and a top panel of the cabinet and configured to move one or more of the plurality of hangers individually into the first chamber or to the outside of the first chamber. a cabinet with an inlet defined in one surface thereof; a main door pivotably disposed on the cabinet so as to open and close the inlet; a first chamber positioned inside the cabinet so as to accommodate therein laundry through the inlet; a first chamber top surface forming a top surface of the first chamber; a second chamber positioned inside the cabinet and at a lower portion of the cabinet to define a space separated from the first chamber; a dividing portion located inside the first chamber and extending in parallel with a first direction that is a height direction of the cabinet and a second direction that is a depth direction of the cabinet to divide the first chamber into one or more accommodation spaces; and a moving driver configured to adjust sizes of the one or more accommodation spaces by moving the dividing portion along a third direction that is a width direction of the cabinet, characterized in that the laundry treating apparatus further comprises: a plurality of cutout holes defined to extend through the first chamber top surface; a hanger assembly including a plurality of hangers respectively inserted into the plurality of cutout holes; and a hanger arranging portion positioned between the first chamber top surface and a top panel of the cabinet and configured to move one or more of the plurality of hangers individually into the first chamber or to the outside of the first chamber. a plurality of cutout holes defined to extend through the first chamber top surface; a hanger assembly including a plurality of hangers respectively inserted into the plurality of cutout holes; and a hanger arranging portion positioned between the first chamber top surface and a top panel of the cabinet and configured to move one or more of the plurality of hangers individually into the first chamber or to the outside of the first chamber.