Abstract: The present invention is a sterilizing apparatus for continuously sterilizing foods, medicines, chemicals, etc. in the manufacture of those products. A hot water storage vessel and a cooling water storage vessel are mounted within a pressure tank, and such products passes through the hot water storage vessel while being carried by chain and are thereby sterilized. The hot water storage vessel is covered with an outer frame assembly and a heat insulating material is inserted therebetween to minimize heat loss. Further, the bearings for supporting the rotating shaft of sprockets which guide the movement of the chain are attached not to the hot water storage vessel but to the outer frame assembly to prevent the bearings from being changed in position or distorted by heat, thereby assuring a smooth rotation of the sprockets.