A packaging apparatus is provided for packaging one or more deposition masks. The apparatus comprises a base comprising a first surface and a first recess; a cover disposed over the base and comprising a second surface facing the first surface and a second recess; a first film placed over the first surface to cover the first recess; a second film placed over the second surface to cover the second recess; and a plurality of insertion sheets interposed between the first film and the second film. The one or more deposition masks comprise a first mask interposed between first and second insertion sheets, the first mask having a width defining a width direction. Each of the first and second insertion sheets comprises a plurality of openings, each extending along the width direction when viewed in a viewing direction perpendicular to the first surface.