A scroll compressor comprising: a compression mechanism that has a fixed scroll and a movable scroll combined with the fixed scroll to form a compression chamber (Sc) and is configured to discharge refrigerant compressed in the compression chamber; a motor that is configured to drive the movable scroll to cause the movable scroll to revolve with respect to the fixed scroll; a casing that accommodates the compression mechanism and the motor and whose inside is partitioned into a first space (S1) in which the motor is disposed and a second space (S2) into which the refrigerant discharged from the compression mechanism flows; a housing that is accommodated inside the casing; and a floating member that is supported by the housing, is configured to be pushed toward the movable scroll by pressure in a back-pressure space (B) formed between the floating member and the housing, and is configured to push the movable scroll against the fixed scroll, characterized by : a first seal member that partitions the back-pressure space into a first chamber (B1) and a second chamber (B2); a first flow passage that is configured to guide the refrigerant in the middle of compression in the compression mechanism to the first chamber, and formed in the fixed scroll and the housing; and a second flow passage that is configured to guide the refrigerant discharged from the compression mechanism to the second chamber, and formed in the fixed scroll and the housing. a compression mechanism that has a fixed scroll and a movable scroll combined with the fixed scroll to form a compression chamber (Sc) and is configured to discharge refrigerant compressed in the compression chamber; a motor that is configured to drive the movable scroll to cause the movable scroll to revolve with respect to the fixed scroll; a casing that accommodates the compression mechanism and the motor and whose inside is partitioned into a first space (S1) in which the motor is disposed and a second space (S2) into which the refrigerant discharged from the compression mechanism flows; a housing that is accommodated inside the casing; and a floating member that is supported by the housing, is configured to be pushed toward the movable scroll by pressure in a back-pressure space (B) formed between the floating member and the housing, and is configured to push the movable scroll against the fixed scroll, characterized by : a first seal member that partitions the back-pressure space into a first chamber (B1) and a second chamber (B2); a first flow passage that is configured to guide the refrigerant in the middle of compression in the compression mechanism to the first chamber, and formed in the fixed scroll and the housing; and a second flow passage that is configured to guide the refrigerant discharged from the compression mechanism to the second chamber, and formed in the fixed scroll and the housing. a first seal member that partitions the back-pressure space into a first chamber (B1) and a second chamber (B2); a first flow passage that is configured to guide the refrigerant in the middle of compression in the compression mechanism to the first chamber, and formed in the fixed scroll and the housing; and a second flow passage that is configured to guide the refrigerant discharged from the compression mechanism to the second chamber, and formed in the fixed scroll and the housing. <EOS>