An aperture module includes a base plate configured to have a central opening and include a pivot pin protruding from one corner area of the base plate, a pair of first blades configured to pivot about the pivot pin to form a first aperture diameter smaller than a diameter of the central opening, a pair of second blades configured to pivot about the pivot pin to form a second aperture diameter smaller than the first aperture diameter, a cover plate, comprising a cover guide slot, configured to cover the pair of first blades and the pair of second blades positioned on the base plate, and an aperture driver, comprising a driving pin coupled to a blade slot disposed in either one of the pair of first blades or the pair of second blades and the cover guide slot and configured to move along the cover guide slot.