A sterilization apparatus for a portable electronic device may include: a case having an opening receiving a portable electronic device; an ultraviolet (UV) irradiation unit arranged in the case, and configured to sterilize the portable electronic device by irradiating UV light onto the portable electronic device; a door connected to the case for opening and closing the opening of the case; and a display unit connected to the portable electronic device, and configured to display an image outputted from the portable electronic device.