Abstract: A reciprocating piston type compressor comprises a cylinder block assembly, a drive shaft rotating together with a swash plate, a plurality of cylinder bores, a plurality of reciprocating pistons fitted within the cylinder bores, front and rear valve plates, front and rear suction and discharge valves, and front and rear housings. The front housing has a suction chamber for a refrigerant gas to be compressed and a discharge chamber for the compressed refrigerant gas in response to reciprocation of the pistons. The rear housing has a suction chamber for a refrigerant gas to be compressed, a discharge chamber for the compressed refrigerant gas, and an outlet chamber for delivering the compressed refrigerant gas carried therein from the discharge chamber of the front housing via a discharge passageway formed in the cylinder block assembly toward an external climate control system. A discharge conduit is formed in the discharge chamber of the rear housing to be orthogonally communicated with the outlet chamber.