A compressor of an embodiment includes a sealed container and a compression mechanism part configured to compress a refrigerant within the sealed container. The refrigerant is an unsaturated refrigerant or a mixed refrigerant containing an unsaturated refrigerant. The compression mechanism part contains chromium. The compression mechanism part includes a first member and a second member. The first member and the second member slide relative to each other. A blend layer containing chromium nitride and titanium nitride is formed on a surface of the first member. The titanium nitride in the blend layer is distributed such that a concentration of the titanium nitride increases and decreases regularly in a thickness direction of the blend layer. Carbide is precipitated on a surface of the second member.

A 2-cylinder rotary compressor includes a head to which an intake pipe is connected; a first cylinder in which a first piston rotates eccentrically inside; a second cylinder in which a second piston rotates eccentrically inside; a middle plate provided between the first cylinder and the second cylinder; a main flow path penetrating from the intake pipe through the head, the first cylinder, and the middle plate to the second cylinder; a first branch flow path branching from the main flow path into an interior of the first cylinder; and a second branch flow path branching from the main flow path into an interior of the second cylinder.