A scroll compressor comprising: a compression mechanism including a fixed scroll including a fixed-side wrap having a spiral shape, and a movable scroll including a movable-side wrap having a spiral shape, the movable scroll being combined with the fixed-side wrap to define a compression chamber (Sc), the compression mechanism being configured to discharge a refrigerant compressed in the compression chamber; a motor configured to drive the movable scroll to cause the movable scroll to revolve relative to the fixed scroll; a drive shaft coupling the movable scroll to the motor; a casing accommodating therein the compression mechanism, the motor, and the drive shaft; a housing accommodated in the casing; and a floating member (30, 130, 230, 330) to be pushed toward the movable scroll by a pressure in a back pressure space formed between the floating member and the housing to press the movable scroll against the fixed scroll, the floating member being supported by the housing, wherein the floating member (30, 130, 230) includes supported portions (37a, 37b, 237) arranged circumferentially at three or more locactions, and the housing (40, 140, 240) includes a supporting portion (41, 141, 241) supporting the supported portions of the floating member such that the floating member is slidable in an axial direction of the drive shaft, wherein each of the supported portions is a bush disposed on the floating member, the supporting portion includes bolts respectively inserted into the bushes, characterised in that the floating member further includes a bearing pivotally supporting the drive shaft, and a ratio of a distance from a center of each bush to a center of the movable-side wrap in the axial direction of the drive shaft to a distance from a center of the bearing to the center of each bush in the axial direction of the drive shaft falls within a range from 0.5 to 1.5. a compression mechanism including a fixed scroll including a fixed-side wrap having a spiral shape, and a movable scroll including a movable-side wrap having a spiral shape, the movable scroll being combined with the fixed-side wrap to define a compression chamber (Sc), the compression mechanism being configured to discharge a refrigerant compressed in the compression chamber; a motor configured to drive the movable scroll to cause the movable scroll to revolve relative to the fixed scroll; a drive shaft coupling the movable scroll to the motor; a casing accommodating therein the compression mechanism, the motor, and the drive shaft; a housing accommodated in the casing; and a floating member (30, 130, 230, 330) to be pushed toward the movable scroll by a pressure in a back pressure space formed between the floating member and the housing to press the movable scroll against the fixed scroll, the floating member being supported by the housing, wherein the floating member (30, 130, 230) includes supported portions (37a, 37b, 237) arranged circumferentially at three or more locactions, and the housing (40, 140, 240) includes a supporting portion (41, 141, 241) supporting the supported portions of the floating member such that the floating member is slidable in an axial direction of the drive shaft, wherein each of the supported portions is a bush disposed on the floating member, the supporting portion includes bolts respectively inserted into the bushes, characterised in that the floating member further includes a bearing pivotally supporting the drive shaft, and a ratio of a distance from a center of each bush to a center of the movable-side wrap in the axial direction of the drive shaft to a distance from a center of the bearing to the center of each bush in the axial direction of the drive shaft falls within a range from 0.5 to 1.5.