A laundry machine adapted to dry laundry by means of a flow of drying air, comprising: a casing for accommodating components necessary for the operation of the laundry machine; inside the casing, a laundry treating chamber adapted to contain the laundry to be dried, said casing further comprising a front wall provided with an opening for accessing the laundry treating chamber; a casing top element incorporating at least part of an air circuit in fluid communication with the laundry treating chamber through an inlet opening and through an outlet opening, and defining an air-path for the flow of drying air between said inlet and outlet openings, said casing top element comprising: a filter housing for removably accommodating a de-fluff filter, said filter housing being provided in the air-path and being accessible through a housing aperture provided on the casing top element; a de-fluff filter for trapping fluff and/or lint particles carried by the flow of drying air crossing said de-fluff filter, the de-fluff filter comprising a filtering element, a hollow chamber accessible through an inlet aperture and through an outlet portion, a cover element and a filter box having a bottom wall a rear sidewall, a front sidewall, a first transversal sidewall, and a second transversal sidewall, said sidewalls delimiting a top aperture which is closable by the cover element movably coupled to the filter box; characterized in that the de-fluff filter further comprises, in the hollow chamber, a plurality of air guiding elements ( 354, 363) that guide the flow of drying air from said inlet aperture, being provided in said rear sidewall, to said outlet portion, being comprised in said second transversal sidewall, wherein the plurality of air guiding elements ( 354, 363) subdivide the filter box in sub-chambers having a sectional area that increases along the drying air flow direction path and distribute homogenously the flow of drying air inside the hollow chamber and along the outlet portion of the de-fluff filter. a casing for accommodating components necessary for the operation of the laundry machine; inside the casing, a laundry treating chamber adapted to contain the laundry to be dried, said casing further comprising a front wall provided with an opening for accessing the laundry treating chamber; a casing top element incorporating at least part of an air circuit in fluid communication with the laundry treating chamber through an inlet opening and through an outlet opening, and defining an air-path for the flow of drying air between said inlet and outlet openings, said casing top element comprising: a filter housing for removably accommodating a de-fluff filter, said filter housing being provided in the air-path and being accessible through a housing aperture provided on the casing top element; a de-fluff filter for trapping fluff and/or lint particles carried by the flow of drying air crossing said de-fluff filter, the de-fluff filter comprising a filtering element, a hollow chamber accessible through an inlet aperture and through an outlet portion, a cover element and a filter box having a bottom wall a rear sidewall, a front sidewall, a first transversal sidewall, and a second transversal sidewall, said sidewalls delimiting a top aperture which is closable by the cover element movably coupled to the filter box; a filter housing for removably accommodating a de-fluff filter, said filter housing being provided in the air-path and being accessible through a housing aperture provided on the casing top element; a de-fluff filter for trapping fluff and/or lint particles carried by the flow of drying air crossing said de-fluff filter, the de-fluff filter comprising a filtering element, a hollow chamber accessible through an inlet aperture and through an outlet portion, a cover element and a filter box having a bottom wall a rear sidewall, a front sidewall, a first transversal sidewall, and a second transversal sidewall, said sidewalls delimiting a top aperture which is closable by the cover element movably coupled to the filter box;