To provide a transverse type twin rotary compressor capable of reducing cost and size with a simple structure, and commonly using a case with a vertical type compressor.

A motor part 11 and a compressor part 12 in which two cylinders 16, 17 are divided through a partitioning plate 18 are jointed by a crank shaft 15 in a transverse direction in a sealed casing 10. Lubrication oil 30 at an oil bank part of the sealed casing is supplied between the crank shaft and bearings 21, 22 which journal the crank shaft. This compressor also has an annular space 19 which is formed around the crank shaft 15 which pierces through the partitioning plate 18 and an oil supply passage 20 which is formed at the partitioning plate 18 for communicating the oil bank part with the annular space 19 and formed so that the injection direction has a factor meeting the traveling direction of the outer-periphery part of the crank shaft 15 in a vector way when the annular space side is used as an injection port for the lubrication oil.