To reduce a dimension of the outer shape of a knob in comparison with a conventional one, to reduce flow resistance and noise of airflow, and to improve a directional characteristic in deflecting the airflow in a wind direction adjusting device.

A guide portion 45 is formed on a connecting member 44 of a plurality of depth fins 40 for deflecting the airflow supplied from the wind direction adjusting device 10, a front fin is disposed to further deflect the airflow deflected by the depth fins 40, a second rod 67 is connected with a first rod 61 rotatably mounted on the front fin through a universal joint 66, an engagement portion 68 mounted on the second rod 67 is engaged with the guide portion 45, the first rod 61 is rotated by the rotation of the knob 62 mounted on the first rod 61, the second rod 67 is rotated through the universal joint 66, the engagement portion 68 is rotated, the connecting member 44 is moved through the guide portion 45 to change the airflow deflecting angle by the plurality of depth fins 40, and an airflow deflecting angle by the front fin is changed by the knob 62.