PURPOSE: To provide a rotation and temperature detecting device which can detect abnormalities in rotation and temperature in a compressor by one sensor..

CONSTITUTION: A plurality of cut out sections 26 are provided at equally divided positions over the circumferential peripheral section 25a of a rotating lug 25 which is perpendicularly fixed onto a drive shaft, and concurrently a rotation and temperature sensor 30 is set in the vicinity of the circumferential peripheral section 25a. The rotation and temperature sensor 30 has a magnet 32, a coil 33 and a movable contact mechanism 37 in closed end cases 31 and 41, and the movable contact mechanism 37 is equipped with a bi-metal contact 40 which varies its displacement at a specified temperature.