A contaminated fluid recovery apparatus (10) includes a dirty tank (20), a conveyor (30), and a drum-shaped filter unit (21). Inlet ports (60, 61) of the drum-shaped filter unit (21) open along an axis (X) of a magnet drum (40). The conveyor (30) scrapes out an object for removal (S) settled on a bottom portion (20a) of the dirty tank (20) toward an exit section (27). The conveyor (30) includes a lower portion (30a) which moves along the bottom portion (20a) and an upper portion (30b) which passes over the lower portion (30a). The magnet drum (40) is located horizontally between the lower portion (30a) and the upper portion (30b) of the conveyor (30) so that its axis (X) is perpendicular to a direction of travel (F) of the conveyor (30). The magnet drum (40) is driven by a chain (33) of the conveyor (30).