The present invention relates to a cosmetic container having a discharge hole automatically opened/closed by an overcap, the cosmetic container comprising: a container body for containing a cosmetic material; and an overcap for opening/closing the container body. The container body comprises a shoulder coupled to an entrance portion thereof and having a first discharge hole, wherein an operation member is configured to be horizontally contracted by the overcap and an opening/closing member is configured to open/close the first discharge hole of the shoulder while being vertically moved by the operation member. When the overcap is put on, the operation member is pushed into the shoulder by the inner periphery of the overcap, and the opening/closing member is pushed downward simultaneously by the operation member to automatically open/close the first discharge hole of the shoulder, thereby easily sealing the container body.