A non-contact power supply system comprising at least one vehicle and at least one power supply device that is one among a plurality of power supply devices and that supplies power between a power reception coil that is provided to one of the at least one vehicles and a power transmission coil that is provided to one of the at least one power supply devices in a non-contact manner by means of at least a magnetic coupling, wherein the vehicle comprises: a vehicle side communication means that permits power transmission from the power transmission coil to the power reception coil with respect to one power supply device among a plurality of the power supply devices by transmitting a permission signal including identification information of the one power supply device; a power detection means for detecting the power that is received by the power reception coil; and a determination means for determining whether or not a paired communication has been established between the vehicle and the power supply device, the power supply device comprises: a power supply device side communication means for receiving the permission signal; and a control means for outputting power from the power transmission coil to the power reception coil, wherein the control means outputs power from the power transmission coil to the power reception coil, when the identification information of the power supply device and the identification information that is included in the permission signal that is received by the power supply device side communication means match, characterised by the step that the determination means determines that a paired communication has been established between the one power supply device and the vehicle, when power is detected by the power detection means. a vehicle side communication means that permits power transmission from the power transmission coil to the power reception coil with respect to one power supply device among a plurality of the power supply devices by transmitting a permission signal including identification information of the one power supply device; a power detection means for detecting the power that is received by the power reception coil; and a determination means for determining whether or not a paired communication has been established between the vehicle and the power supply device, the power supply device comprises: a power supply device side communication means for receiving the permission signal; and a control means for outputting power from the power transmission coil to the power reception coil, wherein the control means outputs power from the power transmission coil to the power reception coil, when the identification information of the power supply device and the identification information that is included in the permission signal that is received by the power supply device side communication means match, characterised by the step that the determination means determines that a paired communication has been established between the one power supply device and the vehicle, when power is detected by the power detection means. a power supply device side communication means for receiving the permission signal; and a control means for outputting power from the power transmission coil to the power reception coil, wherein the control means outputs power from the power transmission coil to the power reception coil, when the identification information of the power supply device and the identification information that is included in the permission signal that is received by the power supply device side communication means match, characterised by the step that the determination means determines that a paired communication has been established between the one power supply device and the vehicle, when power is detected by the power detection means.