The present invention relates to an airtight packaging container, which is easy to carry out a leakage test, includes a cosmetic container (30) for holding a cosmetic (c) containing a high content of moisture and volatile matter (e.g., alcohol, etc.), such as foundation or cosmetic cream; and an airtight lid (60) which is provided on the cosmetic container (30) in order to prevent the moisture and volatile matter of the cosmetic (c) from evaporating and being volatilized, the airtight lid (60) comprising a sealing plate (62) for covering the cosmetic container (30) and a sealing protrusion wheel (64) formed on the underside of the sealing plate and inserted into an opening part of the cosmetic container (30) while being tightly pressed against the opening part, wherein a leakage test member (70) is formed in the sealing plate (62) of the airtight lid (60).