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 (50, 50A, 50B); 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 (50, 50A, 50B) 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 (50, 50A, 50B) 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 (50, 50A, 50B); 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 (50, 50A, 50B) 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 (50, 50A, 50B) formed by the outer wall of the fixed spiral lap and an inner wall of the orbiting spiral lap differentiate from each other.