To realize a compressor small with less vibration by arranging each of compression zones well in balance while sufficiently securing a stroke, etc. of a piston.

The compression zones 6, 25 are connected to eccentric parts 3C, 3D at a position separated from an intermediate position M of a crank shaft 3 by dimensions L1, and inside diameters A of cylinders 7, 26 and the strokes S of the pistons 16, 27 are made equal to each other. Additionally the compression zones 21, 29 are connected to the eccentric parts 3C, 3D at a position separated from the intermediate part M by dimensions L2, and inside diameters A of cylinders 22, 30 and the strokes S of the pistons 23, 31 are made equal to each other. Consequently, a balancer, etc. are not required, and it is possible to reduce vibration while miniaturizing and lightening the compressor. Additionally, it is possible to connect each of connecting rods 17, 24, 28, 32 to the crank shaft 3 by slightly moving a position of each of the pistons in the axial direction, and accordingly, it is possible to sufficiently secure the strokes S even in compact arrangement.