To provide a drive force transmitting device capable of reducing effects of the vibration of a cover member on a temperature sensor and reducing effects of heat transmitted from the cover member to the temperature sensor.

The drive force transmitting device 1 is provided with a heat insulating elastic member 70 plugging a hole 60b formed on the cover member 60; the temperature sensor 80 supported by the heat insulating elastic member 70 to be separated from the cover member 60 and detecting a temperature of a storage space by the cover member 60; and a control means 100 correcting a current supplied to an electromagnet 42 according to the temperature detected by the temperature sensor 80 and suppressing the fluctuation of transmission torque caused by a temperature change in the viscosity of lubricating oil 110.