An air-conditioning apparatus for a vehicle, comprising: an indoor unit including an evaporator, an indoor fan, a return inlet from which air from the vehicle is drawn, and an air supply duct opening through which the air is supplied to the vehicle, the indoor unit being configured to operate the indoor fan to cause the air in the vehicle to flow from the return inlet to the evaporator and send the air passing through the evaporator to the air supply duct opening; an outdoor unit including a compressor, a condenser, and an outdoor fan and configured to form a refrigeration cycle together with the indoor unit; and an airflow direction plate disposed in a housing and elongated in a direction perpendicular to a direction of an air flow from the indoor fan and disposed between the indoor fan in the indoor unit and the air supply duct opening, characterized in that the airflow direction plate has: air vents arranged in a longitudinal direction, inclined plates each disposed to a corresponding one of the air vents, having different angles of inclination corresponding to positions of the air vents, and adjusting an amount and a speed of the air from the indoor fan, and an acoustic material disposed on a surface facing the indoor fan, the indoor unit having a first air passageway allowing the air from the indoor fan to flow in the longitudinal direction of the airflow direction plate, when the air reaches an end portion of the airflow direction plate, the air comes in contact with a side plate of the housing and veers in a direction of the air supply duct opening and a second air passageway allowing the air from the indoor fan to flow into the air vents along the inclined plates. an indoor unit including an evaporator, an indoor fan, a return inlet from which air from the vehicle is drawn, and an air supply duct opening through which the air is supplied to the vehicle, the indoor unit being configured to operate the indoor fan to cause the air in the vehicle to flow from the return inlet to the evaporator and send the air passing through the evaporator to the air supply duct opening; an outdoor unit including a compressor, a condenser, and an outdoor fan and configured to form a refrigeration cycle together with the indoor unit; and an airflow direction plate disposed in a housing and elongated in a direction perpendicular to a direction of an air flow from the indoor fan and disposed between the indoor fan in the indoor unit and the air supply duct opening, characterized in that the airflow direction plate has: air vents arranged in a longitudinal direction, inclined plates each disposed to a corresponding one of the air vents, having different angles of inclination corresponding to positions of the air vents, and adjusting an amount and a speed of the air from the indoor fan, and an acoustic material disposed on a surface facing the indoor fan, the indoor unit having a first air passageway allowing the air from the indoor fan to flow in the longitudinal direction of the airflow direction plate, when the air reaches an end portion of the airflow direction plate, the air comes in contact with a side plate of the housing and veers in a direction of the air supply duct opening and a second air passageway allowing the air from the indoor fan to flow into the air vents along the inclined plates. air vents arranged in a longitudinal direction, inclined plates each disposed to a corresponding one of the air vents, having different angles of inclination corresponding to positions of the air vents, and adjusting an amount and a speed of the air from the indoor fan, and an acoustic material disposed on a surface facing the indoor fan, the indoor unit having a first air passageway allowing the air from the indoor fan to flow in the longitudinal direction of the airflow direction plate, when the air reaches an end portion of the airflow direction plate, the air comes in contact with a side plate of the housing and veers in a direction of the air supply duct opening and a second air passageway allowing the air from the indoor fan to flow into the air vents along the inclined plates.