The anatomy of Korean eyelid is different from that of Caucasians. The cosmetic or reconstructive eyelid surgery is also different from that of Caucasians. Cosmetic eyelid surgery is one of the most popular forms of aesthetic surgery of the Korean face. For proper cosmetic eyelid surgery, plastic surgeon must to master the anatomy of eyelid of Koreans. The eyelids are complex specialized facial adaptations designed to protect, moisten, and clean the ocular surfaces. These components are modified by structures as skin, orbicularis oculi muscle, orbital septum and fat, levator palpebral superioris, Mller muscle, tarsal plate and conjunctiva. All of the complex structures of upper eyelid are morphologically and functionally connected with each other. And it is very important to understand these connections to perform the plastic surgery. However, it is difficult to find references an books that mentioned precise anatomy of Koreans. To get good result in cosmetic eyelid surgery in Koreans, we must have deep, precise knowledge of anatomy in Korean eyelid. We hope that this article offer to better understanding of complex eyelid anatomy and helpful to plastic surgeon for cosmetic eyelid surgery in Korean eyelid.