A blowing device of an air conditioner includes a case (20) connected to an air conditioner of a vehicle; a ventilating flow path (50) formed from an inlet port (50c) to an outlet port (50d) of the case (20); a first inclined portion (51) provided on the inlet port (50c) side of the case (20); a second inclined portion (52) provided on the outlet port (50d) side of the case (20); an intermediate portion (53) formed between the first inclined portion (51) and the second inclined portion (52) in the case (20); and an airflow direction changing device (40) provided in the ventilating flow path (50) and capable of changing an airflow direction of an inflow wind through the inlet port (50c) toward a space between the outlet port (50d) and the intermediate portion (53), wherein the airflow direction changing device (40) includes a plurality of fins (40f) inclined in conjunction with each other.