A power transmission device, comprising: a power transmission unit, including a coil and three capacitors (720, 730, 740) and configured to contactlessly transmit electric power to a vehicle; a first communication device configured to communicate with the vehicle, the vehicle including a resonance circuit for power reception (110, 120; 110, 130; 110, 120, 130) configured to contactlessly receive the electric power output from the power transmission unit, the power transmission unit being configured to be able to form a plurality of resonance circuits for power transmission (710, 720; 710, 730; 710, 730, 740; 710, 720, 730) having circuit configurations different from each other, the first communication device being configured to receive information about the resonance circuit for power reception from the vehicle, characterized in that the resonance circuit for power reception from the vehicle includes a coil and at least a capacitor connected in any of an S configuration (110,120), a P configuration (110, 130), an SP configuration (110, 120, 130) and a PS configuration (110, 120, 130), wherein in the S configuration, the capacitor is connected in series with the coil, in the P configuration, the capacitor is connected in parallel with the coil, in the SP configuration, another capacitor is further connected in series with a circuit having the P configuration, and in the PS configuration, another capacitor is further connected in parallel with a circuit having the S configuration; and the power transmission device comprises: a control device configured to control the power transmission unit to form a resonance circuit in the power transmission unit based on the information from the vehicle received by the first communication device, wherein the information being information indicating which of the S, P, SP or PS configurations is the configuration of the resonance circuit for power reception, and wherein the control device controlling the power transmission unit to form a resonance circuit of the plurality of resonance circuits for power transmission in the power transmission unit based on the information from the vehicle received by the first communication device, the resonance circuit for power transmission having a circuit configuration identical to that of the resonance circuit for power reception. a power transmission unit, including a coil and three capacitors (720, 730, 740) and configured to contactlessly transmit electric power to a vehicle; a first communication device configured to communicate with the vehicle, the vehicle including a resonance circuit for power reception (110, 120; 110, 130; 110, 120, 130) configured to contactlessly receive the electric power output from the power transmission unit, the power transmission unit being configured to be able to form a plurality of resonance circuits for power transmission (710, 720; 710, 730; 710, 730, 740; 710, 720, 730) having circuit configurations different from each other, the first communication device being configured to receive information about the resonance circuit for power reception from the vehicle, the vehicle including a resonance circuit for power reception (110, 120; 110, 130; 110, 120, 130) configured to contactlessly receive the electric power output from the power transmission unit, the power transmission unit being configured to be able to form a plurality of resonance circuits for power transmission (710, 720; 710, 730; 710, 730, 740; 710, 720, 730) having circuit configurations different from each other, the first communication device being configured to receive information about the resonance circuit for power reception from the vehicle, characterized in that the resonance circuit for power reception from the vehicle includes a coil and at least a capacitor connected in any of an S configuration (110,120), a P configuration (110, 130), an SP configuration (110, 120, 130) and a PS configuration (110, 120, 130), wherein in the S configuration, the capacitor is connected in series with the coil, in the P configuration, the capacitor is connected in parallel with the coil, in the SP configuration, another capacitor is further connected in series with a circuit having the P configuration, and in the PS configuration, another capacitor is further connected in parallel with a circuit having the S configuration; and in the S configuration, the capacitor is connected in series with the coil, in the P configuration, the capacitor is connected in parallel with the coil, in the SP configuration, another capacitor is further connected in series with a circuit having the P configuration, and in the PS configuration, another capacitor is further connected in parallel with a circuit having the S configuration; and the power transmission device comprises: a control device configured to control the power transmission unit to form a resonance circuit in the power transmission unit based on the information from the vehicle received by the first communication device, wherein the information being information indicating which of the S, P, SP or PS configurations is the configuration of the resonance circuit for power reception, and wherein the control device controlling the power transmission unit to form a resonance circuit of the plurality of resonance circuits for power transmission in the power transmission unit based on the information from the vehicle received by the first communication device, the resonance circuit for power transmission having a circuit configuration identical to that of the resonance circuit for power reception.