A scroll type compressor includes a housing having a fluid inlet and outlet ports. A fixed scroll is fixed within the housing and has a circular end plate from which a first spiral element extends. The end plate of the fixed scroll partitions the inner chamber of the housing into a front chamber connected to the fluid inlet port and a rear chamber. The rear chamber is divided into a discharge chamber connected to the fluid outlet port and an intermediate pressure chamber. The end plate of the fixed scroll has at least two holes which connect the fluid pockets between the spiral elements to the intermediate pressure chamber. The end plate also has a communicating hole which connects the front chamber and the intermediate chamber. A control device, which controls the communication between the front chamber and the intermediate pressure chamber is disposed on the intermediate pressure chamber. |