A method of producing a pig bone extract and a method of sterilizing a pig bone extract. More specifically speaking, a method of producing a pig bone extract characterized by comprising a UHT sterilization step at 130˚C or lower; and a method of sterilizing a pig bone extract which comprises UHT-sterilizing the pig bone extract at 130˚C or lower. Thus, it is possible to provide a pig bone extract which has little burnt odor and can be stored over a long time.
