PURPOSE: To sufficiently attenuate each vibration component by setting an installation position of a dynamic vibration absorber at a position not on a rotating body where difference in phases of respective vibration components in a radial direction and a rotating direction in a compressor is ±90° or less.

CONSTITUTION: When coolant is compressed in a cylinder 7, a pressure in a compression chamber fluctuates as well as a fluctuation in an angle speed occurs in a rotation of a crank shaft 5, so that a sealed case 2 is vibrated. In this case an inertial body 21 and a tightening fixing part of a dynamic vibration absorber 20 placed in the sealed case 2 vibrate in reverse phases to a vibration and a reverse vibration of the sealed case 2 and reacting torque is applied to the sealed case 2 via a coupling 22 and a fixing jig 23 so that the vibration of the sealed case 2 is attenuated. Since a fixing position of the fixing jig 23 is specified to a position where a vibration in a rotation direction being main vibration is in the same phase as a vibration in a radial direction being sub vibration, the vibration in the radial direction can be attenuated as well as the vibration in the rotation direction.