PURPOSE: Provided is a pressure container part of an oil press to increase the amount of extracted oil and the speed of the oil expression work, and to get clear oil by minimizing burnt oil in the pressure container. CONSTITUTION: The pressure container(100) part comprises an internal and an external cylinder-shaped housings(112,114); a lower oil passing device(10a) elevated by a pressure piston(140) in loading contents to be pressed; an internal pressure cover(70) to open and close an upper part of the housings(112,114); an upper oil passing device(40a) placed on a lower part of the internal pressure cover(70) and a front side of the loaded contents; an oil saucer(130) on a lower part of the housings(112,114); and an oil passing plate(10) having a plurality of air holes(14). A heating device supplies heat to the internal pressure cover(70). Compressed air generated from outside is pressurized and spread to induct oil to the side direction of the container by an air compressor.
