To provide a motor integral type compressor capable of preventing intrusion of a lubricating oil and dust into a motor chamber and hardly receiving respective thermal influence of a compressor body and a motor.

A shaft sealing device 33 preventing the lubricating oil lubricating a bearing of the compressor body 2 from leaking onto a motor side and a shaft sealing cover 37 fixing the shaft sealing device are arranged on the motor side of the bearing 16 supporting a driving shaft 14 on the driving shaft 14 of the compressor body 2. A communicating hole 55 communicating the inside of a power side housing with its outside is formed in the power side housing 31 extending from the compressor body 2. A partition plate 57 connecting an inner peripheral face of the power side housing 31 with the shaft sealing cover 37 to partition the inside of a motor casing 53 and the inside of the power side housing 31 is provided at a position on the motor side of the communicating hole 55.