A scroll compressor comprising: a partition plate for partitioning an interior of a hermetic container into a high pressure space and a low pressure space; a fixed scroll which is adjacent to the partition plate; an orbiting scroll which is meshed with the fixed scroll and which forms compression chambers; a rotation-restraining member for preventing the orbiting scroll from rotating; and a main bearing for supporting the orbiting scroll, in which the fixed scroll, the orbiting scroll, the rotation-restraining member and the main bearing are placed in the low pressure space, the fixed scroll and the orbiting scroll are placed between the partition plate and the main bearing, the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing, wherein the scroll compressor further includes a discharge space which is formed between the partition plate and the fixed scroll and which is in communication with the compression chamber, a ring-shaped first seal member placed on an outer periphery of the discharge space between the partition plate and the fixed scroll, and a ring-shaped second seal member placed on an outer periphery of the first seal member between the partition plate and the fixed scroll, a pressure in a medium pressure space formed between the first seal member and the second seal member is set lower than a pressure in the discharge space and higher than a pressure in the low pressure space, characterised in that, the first seal member and the second seal member are sandwiched by the partition plate by means of a closing member, and the partition plate is provided with an open hole which brings, into commu-nication with each other, the high pressure space and a closed space, and the closed space is closed by the first seal member, the second seal member, the closing member and the partition plate. a partition plate for partitioning an interior of a hermetic container into a high pressure space and a low pressure space; a fixed scroll which is adjacent to the partition plate; an orbiting scroll which is meshed with the fixed scroll and which forms compression chambers; a rotation-restraining member for preventing the orbiting scroll from rotating; and a main bearing for supporting the orbiting scroll, in which the fixed scroll, the orbiting scroll, the rotation-restraining member and the main bearing are placed in the low pressure space, the fixed scroll and the orbiting scroll are placed between the partition plate and the main bearing, the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing, wherein the scroll compressor further includes a discharge space which is formed between the partition plate and the fixed scroll and which is in communication with the compression chamber, a ring-shaped first seal member placed on an outer periphery of the discharge space between the partition plate and the fixed scroll, and a ring-shaped second seal member placed on an outer periphery of the first seal member between the partition plate and the fixed scroll, a pressure in a medium pressure space formed between the first seal member and the second seal member is set lower than a pressure in the discharge space and higher than a pressure in the low pressure space, characterised in that, the first seal member and the second seal member are sandwiched by the partition plate by means of a closing member, and the partition plate is provided with an open hole which brings, into commu-nication with each other, the high pressure space and a closed space, and the closed space is closed by the first seal member, the second seal member, the closing member and the partition plate.