Proposed is a refillable cosmetic container to which an inner container containing cosmetic contents is coupled. The inner container is inserted into an outer container so that a coupling part (22) provided on the upper portion of the inner container (20) is coupled to the stepped part (12) provided on the upper portion of the outer container (10), and a press groove (15) is formed on the first side of the stepped part of the outer container to be recessed downward, so the inner container can be simply separated by the gap formed as the upper portion of the second side of the inner container is lifted upward from the outer container by downwardly pushing the press groove of the outer container on the first side of the upper portion of the inner container, thus making it convenient to refill and use the inner container.