To provide a compressor capable of reducing the size of a sleeve fitted to a closed container by projection welding and of easily connecting a refrigerant pipe to the sleeve at right angles and preventing the closed container from being largely seat-pressed when the sleeve is fitted to the closed container by welding.

This compressor is provided with the sleeve 141 which is mounted corresponding to a through-hole 102 formed on a bent face 100 of the closed container 12 and to which the refrigerant pipe is connected. The sleeve 141 is provided with a small outer diameter part 152 continuously provided via a circumferential step part 151, a large outer diameter part 153, and a tapered-shaped reduced diameter part 154 in an opening end side of the small outer diameter part 152. A through-hole 155 penetrating through the small outer diameter part 152 and the large outer diameter part 153 mainly comprises a small inner diameter part 155A provided in the small outer diameter part 152 and a large inner diameter part 155C continuing to the small inner diameter part 155A via a circumferential step part 155B and provided in the large outer diameter part 153. An opening end side of the small inner diameter part 155A is provided with an extended diameter part 155a of which inner diameter is gradually increased toward the opening end side. A pipe member 145 made of copper is fitted into the large inner diameter part 155C by brazing with one end of the pipe member 145 abutting on the step part 155B, and is fixed to the sleeve 141.