A frame unit provided in a compressor and a method of manufacturing the frame unit with improved productivity. The frame unit is secured between a cylinder block and a stator of the compressor and is adapted to rotatably support a rotary shaft press fitted in a rotor located inside the stator. The manufacturing method of the frame unit comprises: preparing a frame body having a through-opening perforated at a center thereof and a plurality of fastening holes perforated at respective corners thereof, the frame body having a plate shape to be coupled at an upper surface thereof to the cylinder block, preparing a bearing member configured to be inserted and coupled in the through-opening of the frame body to rotatably support the rotary shaft, preparing a plurality of stator supporting poles configured to be inserted and coupled in the respective fastening holes to be supported between the frame body and the stator, and coupling the bearing member to the through-opening of the frame body by means of fixing bolts, and coupling the stator supporting poles to the respective fastening holes.