<；P>；PROBLEM TO BE SOLVED: To provide a technique of detecting the state that a lid is surely closed, in a high-pressure steam sterilizer for sterilizing an object to be sterilized under high-pressure steam. <；P>；SOLUTION: A lid housing at the upper part of a sterilizer body is provided with a lid for tightly closing the upper surface opening of a chamber, closed lid detection switches 7A and 7B arranged on the left and right to be operated by operation rods 21A and 21B which are moved upwards by the closing of the lid housing are provided, and the respective closed lid detection switches are arranged on the left and right on the upper side of a support substrate 14 provided at the lid housing. The operation rods are arranged being inserted into the holes of the upper side and lower side of the support substrate corresponding to the respective operation bodies of the respective closed lid detection switches, and urged to be extended to the lower part of the lid housing by coil springs 22A and 22B. For the respective operation rods, the hole positions of the upper side and the lower side are set so that the surface far from the operation body of the corresponding closed lid detection switch is brought into the wall of the hole in the hole of the upper side, the surface closer to the operation body is brought into contact with the wall of the hole in the hole of the lower side, and the respective operation rods are held in a vertical state to the upper side and the lower side. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
