The vent apparatus includes: a transfer duct located inside an upper surface of an interior of a vehicle; a vent located at a portion of the transfer duct; a variable guide located adjacent to the vent; and a driver located at a first end of the variable guide, and configured to apply a driving force to the variable guide and insert the variable guide into a trim, and to change a shape of the variable guide based on the driving force such that a direction of air discharged through the vent is controlled.