Turbofan and an air conditioner indoor unit

Turbofan 100 includes a boss 1 which rotates about the axis O, a main plate 2 connected with its hub 1, the shroud 3 with suction port 31, a plurality disposed between the main plate 2 and the shroud 3 and a wing 4,104,204, corrugated projections 41a, 141a, 241a are provided on the front edge 41 of the wing 4,104,204, corrugated projections 41a, 141a, 241a has a plurality includes a protrusion 42, the pitch of the plurality of projections 42 are formed to be smaller as the main plate 2 side.