A vehicle air vent includes a plurality of vanes installed in an air discharge port in a body to be rotatable in a horizontal direction. By coupling the vanes to each other, when a knob provided on one vane is operated, all of the vanes are rotated together, and a hinge shaft provided at each of an upper end and a lower end of each vane is inserted into and connected to a hinge hole of a spacer provided at each of an upper end and a lower end of the air discharge port of the air vent body. A damper bushing connected to a front end portion of the vane hinge shaft passing through the hinge hole is installed below the hinge hole of a spacer to which each hinge shaft of the vane provided with the knob is connected.