Sewage pump

The utility model discloses a sewage pump prevents to reduce because of rubbish, solid content messenger pump output that sewage contains. Sewage pump (1) possesses: main shaft (22), make main shaft (22) around rotation axis (R2) rotatory motor (23), form in inside and transfer sewage to the pump case body (12) of swirl room (11) of discharge port (18), be fixed in main shaft (22) and dispose impeller (14) in swirl room (11) from sunction inlet (16). Impeller (14) possess: to sewage give the centrifugation can blade (54) and highly increase ground gradually formed at surperficial a plurality of blades (57) of blade (54) from leading edge (55) of blade (54) to trailing edge (56). The preceding tip (55A) of leading edge (55) of blade (54) is for the root through leading edge (55) (55B) and lie in the downstream side with rotation axis (R2) vertically line (L3) to the line (L4) that joins for the root with leading edge (55) (55B) and rotation axis (R2) is located the opposite one side of direction of rotation (C