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 (41, 43, 47) 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 (41, 43, 47), and a blower configured to circulate air from an interior of the laundry receiving device through the circulation passage (41, 43, 47) and back into the laundry receiving device; - a filter device positioned in the circulation passage (41, 43, 47) to filter air flowing to the heat exchanger, wherein the filter device is removable from the circulation passage (41, 43, 47) 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 (41, 43, 47), wherein the filter guide is configured to guide the filter device into and out of the circulation passage (41, 43, 47); characterized in that the circulation passage (41, 43, 47) 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 (41, 43, 47) 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 (41, 43, 47), and a blower configured to circulate air from an interior of the laundry receiving device through the circulation passage (41, 43, 47) and back into the laundry receiving device; - a filter device positioned in the circulation passage (41, 43, 47) to filter air flowing to the heat exchanger, wherein the filter device is removable from the circulation passage (41, 43, 47) 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 (41, 43, 47), wherein the filter guide is configured to guide the filter device into and out of the circulation passage (41, 43, 47); characterized in that the circulation passage (41, 43, 47) 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.