To provide a vibration power generator excellent in power generation efficiency and capable of stably generating electric power.

A vibration power generator 1 includes a first magnet 12 and a second magnet 14 which have a homopolar opposing structure. The first magnet 12 and the second magnet 14 are fixed to a casing 11. The polarity of contact portions 13E, 13F, 13G of a permanent magnet 13 of the first magnet 12 and the polarity of contact portions 15E, 15F, 15G of the second magnet 14 are opposite to each other. An assembled coil 16 is installed between the first magnet 12 and the second magnet 14 vertically movably. By the vertical movement of the assembled coil 16, the magnetic flux density across each coil 17 constituting the assembled coil 16 is changed. Thus, an electric current is induced in the assembled coil 16.