Compression machine, in particular a compressor, in particular for a compressed air feed of a compressed air supply system, which compression machine comprises a drive and - a cylinder having a first compression chamber, a second compression chamber, an air feed connection and a compressed air outlet, and - a piston, the piston being designed to be moveably guided in the cylinder of the compression machine during operation of the compression machine and to be connectable to a drive via a connecting rod, the connecting rod being connectable to the piston on a piston side (128.1) and rotatably connectable to a rotating part of the drive on a drive side (128.2), the piston comprising: - a first pressurizable end face which is provided to be directed towards a first compression chamber of the compression machine during operation, and, opposite the first end face, a pressurizable second end face which is provided to be directed towards a second compression chamber of the compression machine during operation, the first compression chamber and the second compression chamber being connected to one another via a pressurizable connecting line, and - the first end face being formed as a full-surface solid face and the second end face being formed as an annular stepped face, the piston bearing, on the second end face, a sealing arrangement (1001, 1002, 1003, 1004, 1005, 1006) at least one seal which seals the first compression chamber against the second compression chamber, characterized in that - an annular sealing body is held, as a sealing sleeve (1021, 1022, 1023, 1024, 1025, 1026) of the sealing arrangement (1001, 1002, 1003, 1004, 1005, 1006), in a pressure-tight manner on the stepped face by a profile base, namely between a stepped-face piston ring (1011, 1012, 1013, 1014, 1015, 1016) arranged on the second end face and a compression chamber-side retaining ring (1031, 1032, 1033, 1034, 1035, 1036). - a cylinder having a first compression chamber, a second compression chamber, an air feed connection and a compressed air outlet, and - a piston, the piston being designed to be moveably guided in the cylinder of the compression machine during operation of the compression machine and to be connectable to a drive via a connecting rod, the connecting rod being connectable to the piston on a piston side (128.1) and rotatably connectable to a rotating part of the drive on a drive side (128.2), the piston comprising: - a first pressurizable end face which is provided to be directed towards a first compression chamber of the compression machine during operation, and, opposite the first end face, a pressurizable second end face which is provided to be directed towards a second compression chamber of the compression machine during operation, the first compression chamber and the second compression chamber being connected to one another via a pressurizable connecting line, and - the first end face being formed as a full-surface solid face and the second end face being formed as an annular stepped face, the piston bearing, on the second end face, a sealing arrangement (1001, 1002, 1003, 1004, 1005, 1006) at least one seal which seals the first compression chamber against the second compression chamber, characterized in that - an annular sealing body is held, as a sealing sleeve (1021, 1022, 1023, 1024, 1025, 1026) of the sealing arrangement (1001, 1002, 1003, 1004, 1005, 1006), in a pressure-tight manner on the stepped face by a profile base, namely between a stepped-face piston ring (1011, 1012, 1013, 1014, 1015, 1016) arranged on the second end face and a compression chamber-side retaining ring (1031, 1032, 1033, 1034, 1035, 1036). - a first pressurizable end face which is provided to be directed towards a first compression chamber of the compression machine during operation, and, opposite the first end face, a pressurizable second end face which is provided to be directed towards a second compression chamber of the compression machine during operation, the first compression chamber and the second compression chamber being connected to one another via a pressurizable connecting line, and - the first end face being formed as a full-surface solid face and the second end face being formed as an annular stepped face, the piston bearing, on the second end face, a sealing arrangement (1001, 1002, 1003, 1004, 1005, 1006) at least one seal which seals the first compression chamber against the second compression chamber, characterized in that - an annular sealing body is held, as a sealing sleeve (1021, 1022, 1023, 1024, 1025, 1026) of the sealing arrangement (1001, 1002, 1003, 1004, 1005, 1006), in a pressure-tight manner on the stepped face by a profile base, namely between a stepped-face piston ring (1011, 1012, 1013, 1014, 1015, 1016) arranged on the second end face and a compression chamber-side retaining ring (1031, 1032, 1033, 1034, 1035, 1036).