A laundry dryer machine, wherein a flow of drying air is circulated through a path, which comprises: a fan for moving said flow; a motor for driving said fan; at least one filter (33, 34) for filtering the flow; a drum for containing the laundry to be dried; a condenser with a plurality of channels for the flow of drying air, for removing the moisture absorbed by the flow through the laundry in the drum; a container for collecting the condensate removed from the flow of drying air; a box-like structure for containing the components of the machine, said box-like structure having a base, a top surface, a front vertical wall, a back vertical wall and corresponding lateral vertical walls (5, 6); an opening, in the form of a tubular recess in the front vertical wall having a tubular wall whose axis is parallel to an axis of rotation (X-X) of the drum, for loading the laundry to be dried into the drum and for removing it at the end of the drying process; a door adapted to assume an open position and a closed position to open and close said opening for loading and removing laundry; a conduit for conveying a flow of cooling air to the condenser; said conduit having a fan, a motor for driving it, as well as a first air intake opening and a second air exhaust opening, both openings (21, 22) communicating with the environment outside the machine; characterized in that said filter for the drying air flow comprises two curved hollow bodies (33, 34) facing toward each other, in a contour of the tubular recess of the opening, said curved hollow bodies (33, 34) extending between a grid-like wall that covers an upper part of a first section of the condenser and another grid-like wall opposed thereto which forms a chamber with an envelope wall of the tubular recess; each of the hollow bodies (33, 34) being composed of a front wall (33A, 34A) and a respective back wall (33B, 34B) made of a filter material, spaced from the front wall (33A, 34A) to form respective compartments (33C, 34C); said compartments (33C, 34C) communicating with said chamber through respective openings (33D, 34D), aligned with respective passages (36A, 36B) of said another grid-like wall; said passages (36A, 36B) being configured to be placed in fluid communication each with a respective compartment (33C, 34C) to allow the air to flow in said compartments (33C, 34C). a fan for moving said flow; a motor for driving said fan; at least one filter (33, 34) for filtering the flow; a drum for containing the laundry to be dried; a condenser with a plurality of channels for the flow of drying air, for removing the moisture absorbed by the flow through the laundry in the drum; a container for collecting the condensate removed from the flow of drying air; a box-like structure for containing the components of the machine, said box-like structure having a base, a top surface, a front vertical wall, a back vertical wall and corresponding lateral vertical walls (5, 6); an opening, in the form of a tubular recess in the front vertical wall having a tubular wall whose axis is parallel to an axis of rotation (X-X) of the drum, for loading the laundry to be dried into the drum and for removing it at the end of the drying process; a door adapted to assume an open position and a closed position to open and close said opening for loading and removing laundry; a conduit for conveying a flow of cooling air to the condenser; said conduit having a fan, a motor for driving it, as well as a first air intake opening and a second air exhaust opening, both openings (21, 22) communicating with the environment outside the machine; characterized in that said filter for the drying air flow comprises two curved hollow bodies (33, 34) facing toward each other, in a contour of the tubular recess of the opening, said curved hollow bodies (33, 34) extending between a grid-like wall that covers an upper part of a first section of the condenser and another grid-like wall opposed thereto which forms a chamber with an envelope wall of the tubular recess; each of the hollow bodies (33, 34) being composed of a front wall (33A, 34A) and a respective back wall (33B, 34B) made of a filter material, spaced from the front wall (33A, 34A) to form respective compartments (33C, 34C); said compartments (33C, 34C) communicating with said chamber through respective openings (33D, 34D), aligned with respective passages (36A, 36B) of said another grid-like wall; said passages (36A, 36B) being configured to be placed in fluid communication each with a respective compartment (33C, 34C) to allow the air to flow in said compartments (33C, 34C).