Abstract: A compressor, in particular for the air conditioning system of an automobile, with a housing (1) and a compressor unit (2) accommodated in the housing (1) for taking in and compressing a refrigerant, wherein the compressor unit (2) comprises pistons (7) reciprocating in a cylinder block (6) and a drive disk—swash plate or pivot disk (8)—that drives the pistons (7), is characterized for increasing efficiency in that the drive disk (8) is supported such that a center line (9) of the bearing mount (pivoting or bearing axis) forms a tangent to a reference circle (10) defining the stroke, so that an angle of inclination (11) of the drive disk (8) is variable, without displacing the dead center above the stroke position.