This disclosure relates to a clothing treatment device comprising: a cabinet having a first lateral panel and a second lateral panel which are disposed so as to face each other, an upper panel and a lower panel which connect the first lateral panel and the second lateral panel and respectively form the upper surface and the floor surface, a first rear panel which connects the first lateral panel, the second lateral panel and the upper panel and forms the rear surface, and a second rear panel which connects the first lateral panel and the second lateral panel and is positioned below the first rear panel; a first base having a front panel which is fixed to the first lateral panel, the second lateral panel, the upper panel and the lower panel and forms the front surface of the cabinet and an input port which is provided through the front panel.