A compressor is provided to prevent fastening bolt units placed between a second discharge room of a front/rear housing and the second discharge room from being affected by discharged refrigerant by forming an insulation unit. In a compressor, a plurality of fastening bolt units(16,16a) is formed to an inner circumference direction. A pair of front/rear housings(10a) have an inhalation room and discharging room(12). A pair of cylinder blocks are placed between the front/rear housing. A plurality of pistons performs a reciprocate motion by interlocking a rotation motion of a swash plate. And, an insulation unit(100) prevents a bolt loose from heat expansion in a gap of the fastening bolt unit.
