PURPOSE: Retort sterilization apparatus and heating sterilization method are provided to improve the energy efficiency and to suppress the heat unevenness.CONSTITUTION: A retort sterilizer(100) is equipped with a heating kettle in which a retort food is arranged and a steam generation apparatus(10) which generates steam. The heating kettle(50) is connected to the steam generator, is equipped with an individual liquid path and a steam path and a heat exchanger(90) in which heat exchange takes place between liquid that flows in a liquid path and steam for heating that flows in a steam path. Steam for heating is introduced from a boiler(94) to the steam path of the heat exchanger and the upper part of the heat exchanger liquid path is connected to a steam jet unit(52) which generates steam through a supplying pipe(12). A liquid container(20) is connected which makes the undercurrent of liquid which is supplied to a heat exchanger, the lower liquid path part of the heat exchanger is connected to the liquid container through a commuting tube(30) and the liquid container is connected to the heating kettle. Liquid is stored in the liquid container and the water level of the liquid container and the liquid path of the heat exchanger are conform to each other. A water level control member(23) is installed to control the water level of the liquid in the liquid container. The liquid container is connected to a heating kettle through a connecting pipe. The liquid container is composed of a liquid port main body part(21) with an opening at the top and a lid part(22) which seals the opening of the liquid port main body part. The liquid port main body part is a pressure resistant container and the commuting tube is connected to the lower part of the liquid port main body part.COPYRIGHT KIPO 2013레토르트 식품(70)이 배치되는 가열가마(50)와, 김을 발생시키는 김 발생장치(10)를 구비한 레토르트 살균장치(100)이다. 가열가마(50)는, 김 발생장치(10)에 접속되고, 김 발생장치(10)는 서로 독립된 액체경로(91) 및 증기경로(92)를 구비하며, 액체경로(91)를 유동하는 액체(25)와 증기경로(92)를 유동하는 가열용
