Device for preventing evaporation of cosmetic contents in cosmetic refill case

The present invention relates to a device for preventing the evaporation of cosmetic contents in a cosmetic refill case including a support case (22) having, in the center thereof, a refill case accommodation space (22c) for accommodating a cosmetic refill case (10); and a coupler (24) integrated with the upper end of the support case (22) by a hinge (26), wherein the support case (22) has, in the center thereof, the refill case accommodation space (22c) for accommodating the cosmetic refill case (10) by a support case bottom (22a) and a support case side (22b), and furthermore, the coupler (24) forms an inverted upside-down "L" shape by allowing a coupler side (24a) and a coupler top (24b) to be formed at a right angle.