A vehicle slide door power supply apparatus includes a vehicle body-side primary coil (1) and a slide door-side secondary coil (2), which are brought into proximity to each other upon closing of a slide door to effect a mutual induction operation, thereby supplying electric power from a vehicle body to the slide door, a temperature sensor (3), provided in the vicinity of a proximity fitting surface of the primary coil (1) for the secondary coil (2), and a primary coil control device (4) which is connected to the temperature sensor (3), and can stop the excitation of the primary coil (1) in accordance with the temperature of the proximity fitting surface or the temperature of its vicinity, detected by the temperature sensor (3), so as to interrupt the supply of the electric power to the slide door.
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