Abstract: A cosmetics case having a dual sealing structure is disclosed. The cosmetic case includes an outer case (1), an inner case (10), an inner lid (30), a rail case (20), and an outer lid (40). The outer case has a receiving chamber and a fastening groove. The inner case is received in the receiving chamber such that its fastening step is inserted into the fastening groove, and has a packing groove to receive a packing. A plurality of locking guides is provided on the outer circumference of the inner case. The inner lid is rotated around a second hinge pin, thus opening or closing the inner case, and the lower end of the inner lid comes into close contact with the packing. The rail case is mounted on the outer case. The outer lid includes projections that are guided along the corresponding locking guides.