An improved variable displacement compressor is disclosed. A compressor has a cam plate (22) that is mounted on a drive shaft (16) for integral rotation therewith. At least one piston (35) is coupled to the cam plate (22). The cam plate (22) is tiltable between its maximum inclining position and its minimum inclining position with respect to an axis of the drive shaft (16). The piston (35) reciprocates in a cylinder bore by a stroke based on an inclined angle of the cam plate (22) and compresses gas that is supplied to the cylinder bore (11a) from an external gas circuit (52) and discharge the compressed gas to the external gas circuit (52) that is connected to the interior of compressor by way of a gas passage (32). The shutter body (28) is urged by a first spring (85, 91) and a second spring (86) in opposite directions. The urging force of the first spring (85, 92) is greater than that of the second spring (86). A shutter body (28) that is biased to disconnect the gas passage (32) from the external gas circuit (52).