A household laundry dryer (1) comprises a cabinet (2-5) having a front wall (3) and a rear wall (4), a generally cylindrical laundry drum (7) rotatably mounted within the cabinet (2-5) for rotating according to a substantially horizontal rotational axis (X), support means (8, 9) for rotatably supporting the drum (7), driving means (10-12) for rotating the drum (7). The drum (7) has a metal peripheral wall (13) that is substantially cylindrical and extends between a front wall (14) and a rear wall (15) of the drum (7). The front (14) and rear (15) walls of the drum (7) are substantially flange-shaped, each have at least one hole (14a) for passage of drying air and are fixed to a respective end edge of the peripheral wall (13). According to the invention, at least one between the front wall (14) and the rear wall (15) of the drum (7) has a main body made of plastic material, that is fixed at a respective end edge of the peripheral wall (13).