Power transmitting apparatus, power receiving apparatus, and wireless power transmission system

A power transmitting apparatus (101) includes a power transmitting apparatus side passive electrode (11) and a power transmitting apparatus side active electrode (12), and a power receiving apparatus (201) includes a power receiving apparatus side passive electrode (21) and a power receiving apparatus side active electrode (22). The casing (20) of the power receiving apparatus (201) is substantially shaped like a rectangular parallelepiped, the power receiving apparatus side passive electrode (21) is provided along a first surface having a large area, and a second surface adjacent to the first surface among the six surfaces of the casing is provided with the power receiving apparatus side active electrode (22). The power transmitting apparatus includes a seat (10D) and a backrest (10B). By mounting the power receiving apparatus (201) on the seat (10D) of the power transmitting apparatus (101), the power transmitting apparatus side passive electrode (1) and active electrode (12) respectively face the power receiving apparatus side passive electrode (21) and active electrode (22).