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 and which has a fixed spiral lap ; 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; 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 , and the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing , characterized in that the fixed spiral lap of the fixed scroll is formed from a spiral-starting end to an ending-end and from the ending-end to an inner wall most outer peripheral portion , wherein the fixed spiral lap is formed from the spiral-starting end to the ending-end by an inner wall and an outer wall, and wherein only the inner wall of the fixed spiral lap extends from the ending-end to the inner wall most outer peripheral portion , wherein a containment capacity of one of compression chambers formed by the inner wall most outer peripheral portion of the fixed spiral lap and an outer wall of an ending-end of an orbiting spiral lap , and a containment capacity of the other compression chamber formed by the outer wall of the fixed spiral lap and an inner wall of the orbiting spiral lap differentiate from each other. 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 and which has a fixed spiral lap ; 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; 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 , and the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing , characterized in that the fixed spiral lap of the fixed scroll is formed from a spiral-starting end to an ending-end and from the ending-end to an inner wall most outer peripheral portion , wherein the fixed spiral lap is formed from the spiral-starting end to the ending-end by an inner wall and an outer wall, and wherein only the inner wall of the fixed spiral lap extends from the ending-end to the inner wall most outer peripheral portion , wherein a containment capacity of one of compression chambers formed by the inner wall most outer peripheral portion of the fixed spiral lap and an outer wall of an ending-end of an orbiting spiral lap , and a containment capacity of the other compression chamber formed by the outer wall of the fixed spiral lap and an inner wall of the orbiting spiral lap differentiate from each other. <EOS>