To provide a compressor, in which a muffler opening of a muffler member and a front head member can be easily assembled with high accuracy and generation of noise can be suppressed.

The compressor 10 includes front head members 40, 40a to 40e and muffler members 70, 70a to 70f. Each of the front head members includes a disk portion 41 and cylindrical boss portions 42, 42a to 42d. The disk portion has a front head discharge hole 41c formed so as to discharge a compressed refrigerant. Each of the cylindrical boss portions is extended from a circumference edge of the front head opening provided in the disk portion. Each of the muffler members is disposed outside the front head discharge hole and forms a muffler space S1 together with each of the front head members. Also, each of the muffler members has muffler openings 73, 73a to 73e in which each of the cylindrical boss portions penetrates, and in a state where each of the cylindrical boss portions penetrates into each of the muffler openings, each of the muffler members is tightly in contact with at least two positions on the outer circumference face of each of the cylindrical boss portions.