A compressor comprising: a housing (11, 12, 13); a compression unit arranged in the housing (11, 12, 13), wherein the compression unit is arranged to draw in, compress, and discharge refrigerant gas; a discharge chamber in communication with the compression unit; an outlet in communication with the discharge chamber, wherein the outlet is formed in the housing (11, 12, 13) to discharge the refrigerant gas out of the housing (11, 12, 13); and an oil separation structure (41, 44, 46, 47, 48) arranged between the discharge chamber and the outlet, wherein the oil separation structure (41, 44, 46, 47, 48) is arranged to separate lubrication oil from the refrigerant gas and accumulates separated lubrication oil, wherein the oil separation structure (41, 44, 46, 47, 48) extends in a vertical direction, and wherein the oil separation structure (41, 44, 46, 47, 48) includes: an oil reservoir that is arranged to accumulate the lubrication oil separated from the refrigerant gas, an oil separation compartment that is located above the oil reservoir and is in communication with the oil reservoir, an intake passage that extends upward from the oil separation compartment and is in communication with the discharge chamber, wherein the intake passage is arranged to draw the refrigerant gas from the discharge chamber into the oil separation compartment to separate the lubrication oil from the refrigerant gas, an exhaust passage that extends upward from the oil separation compartment and is in communication with the outlet, wherein the exhaust passage is arranged to discharge the refrigerant gas from the oil separation compartment through the outlet and out of the housing (11, 12, 13), and a supply passage that extends upward from the oil separation compartment and has a larger cross-sectional area than the intake passage, wherein the supply passage is arranged to supply the separated lubrication oil from the oil separation compartment to the oil reservoir, characterized in that the intake passage, the exhaust passage, and the supply passage are arranged next to one another, and the exhaust passage is arranged between the intake passage and the supply passage. a housing (11, 12, 13); a compression unit arranged in the housing (11, 12, 13), wherein the compression unit is arranged to draw in, compress, and discharge refrigerant gas; a discharge chamber in communication with the compression unit; an outlet in communication with the discharge chamber, wherein the outlet is formed in the housing (11, 12, 13) to discharge the refrigerant gas out of the housing (11, 12, 13); and an oil separation structure (41, 44, 46, 47, 48) arranged between the discharge chamber and the outlet, wherein the oil separation structure (41, 44, 46, 47, 48) is arranged to separate lubrication oil from the refrigerant gas and accumulates separated lubrication oil, wherein the oil separation structure (41, 44, 46, 47, 48) extends in a vertical direction, and wherein the oil separation structure (41, 44, 46, 47, 48) includes: an oil reservoir that is arranged to accumulate the lubrication oil separated from the refrigerant gas, an oil separation compartment that is located above the oil reservoir and is in communication with the oil reservoir, an intake passage that extends upward from the oil separation compartment and is in communication with the discharge chamber, wherein the intake passage is arranged to draw the refrigerant gas from the discharge chamber into the oil separation compartment to separate the lubrication oil from the refrigerant gas, an exhaust passage that extends upward from the oil separation compartment and is in communication with the outlet, wherein the exhaust passage is arranged to discharge the refrigerant gas from the oil separation compartment through the outlet and out of the housing (11, 12, 13), and a supply passage that extends upward from the oil separation compartment and has a larger cross-sectional area than the intake passage, wherein the supply passage is arranged to supply the separated lubrication oil from the oil separation compartment to the oil reservoir, an oil reservoir that is arranged to accumulate the lubrication oil separated from the refrigerant gas, an oil separation compartment that is located above the oil reservoir and is in communication with the oil reservoir, an intake passage that extends upward from the oil separation compartment and is in communication with the discharge chamber, wherein the intake passage is arranged to draw the refrigerant gas from the discharge chamber into the oil separation compartment to separate the lubrication oil from the refrigerant gas, an exhaust passage that extends upward from the oil separation compartment and is in communication with the outlet, wherein the exhaust passage is arranged to discharge the refrigerant gas from the oil separation compartment through the outlet and out of the housing (11, 12, 13), and a supply passage that extends upward from the oil separation compartment and has a larger cross-sectional area than the intake passage, wherein the supply passage is arranged to supply the separated lubrication oil from the oil separation compartment to the oil reservoir, characterized in that the intake passage, the exhaust passage, and the supply passage are arranged next to one another, and the exhaust passage is arranged between the intake passage and the supply passage.