A scroll compressor comprising: a fixed scroll including a fixed-side flat plate and a fixed-side wrap having a spiral shape and extending from a front face of the fixed-side flat plate; a movable scroll including a movable-side flat plate and a movable-side wrap having a spiral shape and extending from a front face of the movable-side flat plate; a crank shaft configured to rotate about a rotation axis and to drive the movable scroll; a motor configured to rotate the crank shaft; and a casing having an internal space that is defined for accommodating the fixed scroll, the movable scroll, the crank shaft, and the motor, wherein the casing includes an oil reservoir where a refrigerating machine oil is retained, the oil reservoir being located on a bottom of the internal space, wherein the casing has a place where the motor is accommodated, the place serving as a low-pressure space into which a low-pressure gas refrigerant is sucked externally, wherein the fixed scroll and the movable scroll define a first compression chamber surrounded with the front face of the fixed-side flat plate, the front face of the movable-side flat plate, an inner peripheral face of the fixed-side wrap, and an outer peripheral face of the movable-side wrap, the fixed scroll and the movable scroll define a second compression chamber surrounded with the front face of the fixed-side flat plate, the front face of the movable-side flat plate, an outer peripheral face of the fixed-side wrap, and an inner peripheral face of the movable-side wrap, the scroll compressor has a symmetric wrap structure so that the first compression chamber and the second compression chamber are defined in a point symmetric state, the fixed scroll and the movable scroll are disposed on an upper part of the internal space in the casing, and characterised in that the fixed scroll has a first passage for guiding a gas refrigerant in the low-pressure space, to the first compression chamber and the second compression chamber, the movable scroll has a second passage for guiding the gas refrigerant in the low-pressure space, to the first compression chamber, each of the gas refrigerant which has passed through the first passage and the gas refrigerant which has passed through the second passage flows into the first compression chamber, and the gas refrigerant which has passed through the first passage flows into the second compression chamber. a fixed scroll including a fixed-side flat plate and a fixed-side wrap having a spiral shape and extending from a front face of the fixed-side flat plate; a fixed-side flat plate and a fixed-side wrap having a spiral shape and extending from a front face of the fixed-side flat plate; a movable scroll including a movable-side flat plate and a movable-side wrap having a spiral shape and extending from a front face of the movable-side flat plate; a movable-side flat plate and a movable-side wrap having a spiral shape and extending from a front face of the movable-side flat plate; a crank shaft configured to rotate about a rotation axis and to drive the movable scroll; a motor configured to rotate the crank shaft; and a casing having an internal space that is defined for accommodating the fixed scroll, the movable scroll, the crank shaft, and the motor, wherein the casing includes an oil reservoir where a refrigerating machine oil is retained, the oil reservoir being located on a bottom of the internal space, wherein the casing has a place where the motor is accommodated, the place serving as a low-pressure space into which a low-pressure gas refrigerant is sucked externally, wherein the fixed scroll and the movable scroll define a first compression chamber surrounded with the front face of the fixed-side flat plate, the front face of the movable-side flat plate, an inner peripheral face of the fixed-side wrap, and an outer peripheral face of the movable-side wrap, the fixed scroll and the movable scroll define a second compression chamber surrounded with the front face of the fixed-side flat plate, the front face of the movable-side flat plate, an outer peripheral face of the fixed-side wrap, and an inner peripheral face of the movable-side wrap, the scroll compressor has a symmetric wrap structure so that the first compression chamber and the second compression chamber are defined in a point symmetric state, the fixed scroll and the movable scroll are disposed on an upper part of the internal space in the casing, and characterised in that the fixed scroll has a first passage for guiding a gas refrigerant in the low-pressure space, to the first compression chamber and the second compression chamber, the movable scroll has a second passage for guiding the gas refrigerant in the low-pressure space, to the first compression chamber, each of the gas refrigerant which has passed through the first passage and the gas refrigerant which has passed through the second passage flows into the first compression chamber, and the gas refrigerant which has passed through the first passage flows into the second compression chamber.