The cosmetic container having a release prevention device in which a vertical bar type stopper is applied to a release-prevention and locking device and a vertical panel type protrusion having teeth is installed to implement a stopper function, a release-prevention function, and a remaining liquid absorbing function. The cosmetic container includes a connector tube stuck to the inner wall of the cylinder, a hollow piston coupled with the lower end of the connector tube to support the connector tube, a release-preventing and locking device having a lower end to be inserted into the cylinder and allowing a screw-coupling of an upper outer side of the cosmetic container, and a push button coupled with the top of the release-preventing and locking device and pumping the hollow piston while up-and-down movements to pump the content in the cosmetic container out through an ejection hole.