PURPOSE: A device for fixing an outer case capable of containing a cinerary urn is provided to form a first fastening member in a bottom surface of an outer case and a second fastening member in an outer case fixing unit correspondently to the first fastening member, thereby preventing the separation or rotation of the outer case from/around the outer case fixing unit. CONSTITUTION: A device for fixing an outer case capable of containing a cinerary urn comprises an outer case(100) and outer case fixing unit(300). A predetermined space in which a cinerary urn is inserted is formed in the outer case. The outer case fixing unit is fastened to a bottom surface of the outer case and firmly support the outer case so that the outer case is not moved. A first fastening member is arranged in the bottom surface of the outer case. The first fastening member is projected to a direction fastened to the outer case fixing unit. The outer case fixing unit comprises a cinerary urn supporter, a guide, and a supporter peripheral unit. A second fastening member is placed in a center of the cinerary urn supporter. The second fastening member is fastened to the first fastening member. The guide guides the outer case so that the outer case is fixed to the cinerary urn supporter.본 발명은 유골함을 담을 수 있는 외함의 고정 장치에 관한 것이다.본 발명의 일실시 예에 따른 유골함을 담을 수 있는 외함의 고정 장치는 유골을 담을 수 있는 소정의 공간이 형성되는 납골외함부와 납골외함부의 하단면과 체결되어 납골외함부가 움직이지 않도록 견고하게 지지하는 납골함고정부를 포함하고, 납골외함부는 납골외함부의 하단면에 납골함고정부와 체결되는 방향으로 돌출되어 형성되는 제1 체결부재가 적어도 하나 이상 배치되는 것을 포함한다.