A laundry dryer according to one embodiment of the present invention comprises: a drying drum having an opening formed at the front side thereof; a front cabinet erected at the front side of the drying drum, and having an input hole formed at a portion corresponding to the opening; and a filter assembly mounted at the back side of the front cabinet corresponding to the lower side of the input hole, and through which humid air discharged from the drying drum passes, wherein the filter assembly can comprise: a case having an exhaust hole formed at the back side thereof; a blocking filter coupled to the upper side of the case; a lint filter unit penetrating the blocking filter so as to be slidably inserted or withdrawn in a vertical direction; a cleaning nozzle disposed at the front or rear of the lint filter unit; and a filter housing accommodated inside the case and disposed at the lower side of the lint filter unit.