FIG. 6 is a view illustrating a state that the power reception coupler 120 of the wireless power transmission system illustrated in FIG. 2 is disposed by rotating 90 degrees counterclockwise. FIG. 7 is a diagram illustrating frequency characteristics of transmission efficiency η21 from the power transmission coupler 110 to the power reception coupler 120 and reflection loss η11 in the disposition state of FIG. 6. As illustrated in FIG. 7, the transmission efficiency η21 becomes 0 and the reflection loss η11 becomes a value close to 1, and thus most of the power inputted to the power transmission coupler 110 is reflected and not transmitted to the power reception coupler 120. Further, as illustrated in FIG. 8, it becomes a state that the input impedance S11 is low, and a state that the impedance does not match. Thus, in the wireless power transmission system illustrated in FIG. 2, power cannot be transmitted in a state that the power transmission coupler 110 and the power reception coupler 120 are orthogonal as illustrated in FIG. 6. From the above, in the wireless power transmission system illustrated in FIG. 2, when the power transmission coupler 110 and the power reception coupler 120 are rotated about an axis, it leads to deterioration in characteristics.