Provided is a cosmetic container having an airtight refill case that hermetically keeps a cosmetic such as a moisture-containing compact powder, a moisture-containing cream, and an eye shadow. More particularly, it relates to a cosmetic container having an airtight refill case 20 that is more hermetically sealed in a double airtight structure by coupling a lower main body 21 and an upper lid 25 of the refill case 20 with a butterfly hinge and by fitting an assembly groove part 22 having ring-shaped assembly protrusions 23 to an assembly protrusion part having ring-shaped assembly grooves 27 without a specific packing, in which the upper lid of the refill case is pressed by pressing protrusions 30 on the upper lid, when an outer container lid is closed.