A storage box power supply structure for a saddled vehicle, comprising: a storage box; a carrier provided on a rear section of a vehicle and configured to detachably mount the storage box on a vehicle body; a pair of left and right side stoppers configured to protrude from a lower surface of the storage box, wherein a pair of left and right front hooks disposed on a front lower section of the storage box, wherein the left and right side stoppers face each other via a rear hook disposed at a center of a rear lower section of the storage box, wherein the rear hook disposed between the left and right side stoppers; a pair of left and right front hook receiving sections configured to receive the left and right front hooks, wherein the left and right front hook receiving sections provided in a front section of the carrier; a pair of left and right stopper receiving sections configured to receive the pair of left and right side stoppers, wherein the left and right stopper receiving sections provided on an upper surface of a rear section of the carrier; a stopper-side terminal provided on the left and right side stoppers itself and configured to supply electric power to an electrical component; and a receiving-side terminal provided on the left and right stopper receiving sections itself, connected to the stopper-side terminal when the storage box is mounted on the carrier and configured to rub against the stopper-side terminal, wherein the plurality of receiving-side terminals are provided at intervals in a vehicle width direction, wherein the plurality of receiving-side terminals are provided in one stopper receiving section. a storage box; a carrier provided on a rear section of a vehicle and configured to detachably mount the storage box on a vehicle body; a pair of left and right side stoppers configured to protrude from a lower surface of the storage box, wherein a pair of left and right front hooks disposed on a front lower section of the storage box, wherein the left and right side stoppers face each other via a rear hook disposed at a center of a rear lower section of the storage box, wherein the rear hook disposed between the left and right side stoppers; a pair of left and right front hook receiving sections configured to receive the left and right front hooks, wherein the left and right front hook receiving sections provided in a front section of the carrier; a pair of left and right stopper receiving sections configured to receive the pair of left and right side stoppers, wherein the left and right stopper receiving sections provided on an upper surface of a rear section of the carrier; a stopper-side terminal provided on the left and right side stoppers itself and configured to supply electric power to an electrical component; and a receiving-side terminal provided on the left and right stopper receiving sections itself, connected to the stopper-side terminal when the storage box is mounted on the carrier and configured to rub against the stopper-side terminal, wherein the plurality of receiving-side terminals are provided at intervals in a vehicle width direction, wherein the plurality of receiving-side terminals are provided in one stopper receiving section.