A clothing processing device comprises: a casing in which a processing chamber, where clothing is held, and a machine chamber at a lower side of the processing chamber are formed; a base which defines a floor of the machine chamber; a heat pump module which conditions air supplied into the processing chamber; at least one supporter which supports the heat pump module and defines a predetermined receiving area in a space from the base at a lower side of the heat pump module; a steam generating module which is fixedly arranged in the receiving area to generate steam to be supplied into the processing chamber; and a controller which controls at least one of the heat pump module and the steam generating module, and is disposed below the steam generating module in the receiving area. According to the present invention, maintenance and repair of devices can be easily performed.