A laundry treatment apparatus for drying and washing of laundry, comprising: - a cabinet having a laundry opening formed therein; - a laundry receiving device provided in the cabinet and configured to receive laundry therein through the laundry opening formed in the cabinet , wherein the laundry receiving device includes a tub received within the cabinet to store wash water therein and a drum rotatably received within the tub to store laundry therein; - a control panel coupled to the cabinet above the laundry opening ; - a detergent supply device installed within the cabinet to store detergent to be supplied to the tub ; - a hot air supply device including: a circulation passage configured to guide air discharged from the laundry receiving device and to resupply the air back into the laundry receiving device, a heat exchanger provided in the circulation passage , and a blower configured to circulate air from an interior of the laundry receiving device through the circulation passage and back into the laundry receiving device; - a filter device positioned in the circulation passage to filter air flowing to the heat exchanger , wherein the filter device is removable from the circulation passage through a corresponding portion of the cabinet ; - a filter separation/coupling passage that penetrates the cabinet and through which the filter device passes; - a filter guide connecting the filter separation/coupling passage and the circulation passage , wherein the filter guide is configured to guide the filter device into and out of the circulation passage ; characterized in that the circulation passage extends in a diagonal direction across the upper portion of the laundry receiving device, and that the filter separation/coupling passage is formed to penetrate the cabinet in a space between the control panel and the detergent supply device arranged parallel to each other. - a cabinet having a laundry opening formed therein; - a laundry receiving device provided in the cabinet and configured to receive laundry therein through the laundry opening formed in the cabinet , wherein the laundry receiving device includes a tub received within the cabinet to store wash water therein and a drum rotatably received within the tub to store laundry therein; - a control panel coupled to the cabinet above the laundry opening ; - a detergent supply device installed within the cabinet to store detergent to be supplied to the tub ; - a hot air supply device including: a circulation passage configured to guide air discharged from the laundry receiving device and to resupply the air back into the laundry receiving device, a heat exchanger provided in the circulation passage , and a blower configured to circulate air from an interior of the laundry receiving device through the circulation passage and back into the laundry receiving device; - a filter device positioned in the circulation passage to filter air flowing to the heat exchanger , wherein the filter device is removable from the circulation passage through a corresponding portion of the cabinet ; - a filter separation/coupling passage that penetrates the cabinet and through which the filter device passes; - a filter guide connecting the filter separation/coupling passage and the circulation passage , wherein the filter guide is configured to guide the filter device into and out of the circulation passage ; characterized in that the circulation passage extends in a diagonal direction across the upper portion of the laundry receiving device, and that the filter separation/coupling passage is formed to penetrate the cabinet in a space between the control panel and the detergent supply device arranged parallel to each other. <EOS>