To provide a wind direction adjustment device for a vehicle allowing the wide angle delivery of air blown out from an air blowing out port having a narrow width.

A plurality of groups of front louvers 4 provided so as to be turnable at the air blowing out port 3a having narrow width are arranged such that they become approximately symmetrical relative to the center of the air blowing out port 3a. An angle adjustment means 5 for adjusting an angle so that the respective groups of front louvers 4 have reverse phases when the wind direction of air blown into a cabin from the air blowing out port 3a is adjusted to a neutral position, and further adjusting the angle so that the respective groups of front louvers 4 have the same phases when the wind direction is adjusted to a direction other than the neutral is provided. When the wind direction is adjusted to the neutral position, a linear advancement wind with a wide angle is obtained and when the wind direction is adjusted to the direction other than the neutral position, sufficient wind direction adjustment performance is obtained.