A power transmission unit, comprising: a substrate that includes a first layer including a flat plate-like first substrate and a first coil pattern group having more than two first coil patterns spirally formed around an axial line and disposed on the first substrate, and a second layer including a flat plate-like second substrate and a second coil pattern group having more than two second coil patterns spirally formed around the axial line and disposed on the second substrate, wherein the first coil pattern group has the more than two first coil patterns (42a to 42i) arrayed along a direction intersecting with the axial line and disposed on at least two layers of the first substrate in a manner of being stacked on one over another along an axial line direction, and the second coil pattern group has the more than two second coil patterns (45a to 45i) arrayed in the intersecting direction and disposed on at least two layers of the second substrate in a manner of being stacked on one over another along the axial line direction, characterized in that the first coil pattern group and the second coil pattern group are connected with each other with the first coil pattern, located in one of the at least two layers which is furthest from the second coil pattern group in the axial line direction and located furthest from the axial line in the intersecting direction, connected with the second coil pattern, located in one of the at least two layers which is furthest from the first coil pattern group in the axial line direction and located closest to the axial line in the intersecting direction, and with the first coil pattern, located in one of the at least two layers which is closest to the second coil pattern group in the axial line direction and located furthest from the axial line in the intersecting direction, connected with the second coil pattern, located in one of the at least two layers which is closest to the first coil pattern group in the axial line direction and located closest to the axial line in the intersecting direction, and wirelessly transmit electric power to a counterpart power reception coil pattern. a substrate that includes a first layer including a flat plate-like first substrate and a first coil pattern group having more than two first coil patterns spirally formed around an axial line and disposed on the first substrate, and a second layer including a flat plate-like second substrate and a second coil pattern group having more than two second coil patterns spirally formed around the axial line and disposed on the second substrate, wherein the first coil pattern group has the more than two first coil patterns (42a to 42i) arrayed along a direction intersecting with the axial line and disposed on at least two layers of the first substrate in a manner of being stacked on one over another along an axial line direction, and the second coil pattern group has the more than two second coil patterns (45a to 45i) arrayed in the intersecting direction and disposed on at least two layers of the second substrate in a manner of being stacked on one over another along the axial line direction, characterized in that the first coil pattern group and the second coil pattern group are connected with each other with the first coil pattern, located in one of the at least two layers which is furthest from the second coil pattern group in the axial line direction and located furthest from the axial line in the intersecting direction, connected with the second coil pattern, located in one of the at least two layers which is furthest from the first coil pattern group in the axial line direction and located closest to the axial line in the intersecting direction, and with the first coil pattern, located in one of the at least two layers which is closest to the second coil pattern group in the axial line direction and located furthest from the axial line in the intersecting direction, connected with the second coil pattern, located in one of the at least two layers which is closest to the first coil pattern group in the axial line direction and located closest to the axial line in the intersecting direction, and wirelessly transmit electric power to a counterpart power reception coil pattern.