POWER GENERATION DEVICE

[Problem] To provide a power generation device that is capable of increasing an electromotive force by swiftly rotating a rotating body including a magnet irrespective of the operation speed of an operation member. [Solution] When an operation shaft 33 and a slide part 32 are pushed downward, a pushing action portion 43 of a push member 34 comes into contact with a first pushed portion 41 of a rotating body 20. When the slide portion 32 moves further downward, a switching spring member 36 provided between the slide portion 32 and the push member 34 is compressed, and the elastic force of the switching spring member 36 causes the push member 34 to urge the rotating body 20 to swiftly rotate in the counterclockwise direction. As a result, the direction of a magnetic flux in a coil magnetic core 13 abruptly changes, and an electromotive force is induced in a power generation coil 15.