rotation o 2 of this eccentric part 12 the rest is the same as in the first embodiment regarding the third embodiment as well as shown in fig6 the shaft 12 axial center o 1 is attached so as to rotate with respect to the casing 1 and the cylinder 8 is driven to rotate from the rotor 11 side through the drive plate 13 in this case an electric motor of a type where unlike a normal motor the stator 2 is at the inside is used the motor rotor 3 is formed integrally with the shaft 12 axial center o 1 together with the rotor 11 of the compressor since the shaft 12 has the off centered eccentric part 12 u2032 set at the shaft 12 the cylinder 8 can rotate by the drive plate 13 around the center of rotation o 2 of this eccentric part 12 u2032 the rest is the same as in the first embodiment the fourth embodiment is an embodiment in which the suction and discharge of the first embodiment are reversed in this case the suction port 16 is set at the position of reference sign 23 in fig1 the part 21 of the side plate 27 becomes the compression chamber suction port 21 u2032 reed valve unnecessary as shown in fig7 at the front of the drive plate 13 in the direction of rotation a compression chamber 9 is formed while at the rear a suction chamber 10 is formed so.