Abstract: A sealed compressor for use in an air conditioner or a refrigerator. The sealed compressor has an electrically driving portion which includes a rotor having a dust reservoir for collecting and storing dust or the like, which reservoir is formed in the central part of the rotor. Further, the dust reservoir is connected to a through hole, in which lubricating oil flows, of a driving shaft through a horizontal hole. Thus, dust contained in lubricating oil are moved outward by centrifugal force. Further, when dust enter the dust reservoir, such dusts are stored therein. Furthermore, the stored dust cannot get out of the dust reservoir. As the result, dust contained in the lubricating oil can be prevented from getting into the sliding portion. Moreover, the sliding portion can be prevented from being damaged by dust contained in the lubricating oil. Consequently, a sealed compressor with high reliability can be provided.