The present invention relates to a sealing structure of a cream-type cosmetics container, the sealing structure having an elastic protrusion formed to be bent and brought into close contact with a mounting groove when a pressurizing part, provided at the inner upper side of a finishing cap, makes contact with the upper end surface of a pumping guide cap during a process of coupling the finishing cap to a container body, thereby performing an efficient sealing function as the volume of a space formed by the pumping guide cap and the finishing cap is being reduced and pressure therein is increasing, and preventing a first valve member from opening a contents discharge hole and thereby preventing the leakage of contents even if the internal pressure of the container body increases.