Power transmitting device and the power receiving device

PROBLEM TO BE SOLVED: To provide a power transmission device and a power reception device that are able to restrict a coupling coefficient from changing significantly even if a vertical distance between the power transmission coil and the power reception coil changes.SOLUTION: A power transmission device 3 comprises a power transmission coil 12 formed so as to surround the periphery of a wind shaft O1 extending vertically and having a hollow part 31 in the center thereof; a ferrite 15 on the upper face of which the transmission coil 12 is arranged and which has an opening 32 located in the hollow part 31 of the power transmission coil 12 when viewed from above; and a top plate part 25 made of metal, which is located in the hollow part 31 and opening 32 as viewed from above the power transmission coil 12 and ferrite 15.SELECTED DRAWING: Figure 4