To maintain airtightness by an elastic sealing material over a long period of time.

For this airtight cosmetic container, by openably and closably attaching an outer lid to a container main body 1 for housing an inner tray 2 for housing cosmetics and attaching the elastic sealing material 5 to a surface opposite to the opening edge top surface 4 of the inner tray 2 set at the peripheral edge part of an inner lid 3 attached to the inner surface of the outer lid corresponding to the inner tray 2, the airtightness between the inner lid 3 and the inner tray 2 is secured through the elastic sealing material 5. In this case, by providing a sealing surface 6 on the opening edge outer peripheral surface of the inner tray 2 and providing a sealing lip 8 to be in close contact with the sealing surface 6 on the elastic sealing material 5, a sealing part having the sealing surface 6 and the sealing lip 8 is isolated from the housing part of the cosmetics or the like through the opening edge top surface 4 and a stable airtight action is performed over a long period of time.