The invention relates to a machine (M) for cleaning poultry offal (X), comprising first pre-cleaning rollers (3 and 4) positioned underneath a guide unit (M1) for directing the offal (X) to a gripper and conveyor chain (M2) for conveying the offal (X) from the pre-cleaning rollers (3 and 4) to a pressing unit (M5), also passing through a cutting element (M3) and through a unit (M4) for washing the offal (X). The machine (M) also comprises a trough (6) for directing the offal (X) to a cleaning system (L) installed transversely in the machine (M), in order to allow said offal (X) to be carried from the trough (6) to the discharge trough (M6). The invention further describes a method for cleaning poultry offal (X), applied to the machine (M).