A compressor includes a casing, a compression mechanism, a drive shaft, a main frame, a motor, a flow path forming member, and a temperature measuring mechanism. The casing stores lubricating oil in its bottom portion. The main frame has the compression mechanism placed on it and supports the drive shaft in such a way that the drive shaft may freely rotate. The flow path forming member forms an oil flow path at a space adjacent an inner peripheral surface of the casing. The oil flow path carries a flow of lubricating oil, which lubricates sliding portions including the compression mechanism and the drive shaft. The temperature measuring mechanism is disposed outside the casing. The temperature measuring mechanism measures the temperature of a section of an outer peripheral surface of the casing adjacent the oil flow path.