A power generating element mounting board includes: a power generating element having a first terminal and a second terminal; and a board having a first board terminal connected with the first terminal, a second board terminal connected with the second terminal, and at least a first hole and a second hole. The first hole has a first conductive part provided on a surface of the first hole, the second hole has a second conductive part provided on a surface of the second hole. The first hole is provided between the first board terminal and a first outer edge of the board, and the second hole is provided between the second board terminal and a second outer edge of the board.