The present invention provides a compressor housing (2) capable of reducing the weight of a compressor (1) without leading to an increase in the size and a reduction in the efficiency of the compressor (1). The compressor (1) housing includes: an inner cylinder (8) made of a plastic material and extending in an axial direction and in a circumferential direction to surround blade tips (7a) of the blades (7); and an outer cylinder (9) made of a plastic material and extending in the axial direction and in the circumferential direction to surround the inner cylinder (8). The inner cylinder (8) and the outer cylinder (9) are bonded or jointed at the first end, opposite the second end where the volute is formed.
