Disclosed herein is an air vent device, the air vent device including a garnish including an opening in which an air vent hole is located, a grille unit located between an outer surface of the air vent hole and an inner surface of the garnish, a first wing located at an outer side of the air vent hole in a lateral direction and configured to be pivoted based on one end of the grille unit, a deco part located on an outer surface of the garnish, and a knob configured to control a direction of a wind discharged from the air vent hole, wherein the knob is located to surround a portion of the deco part and configured to be capable of controlling a direction of a wind in a vertical direction by operating the first wing.