Wave power generator

A wave power generator enables high-efficiency conversion of wave energy into electric energy. The structure of the wave power generator is simple, thereby lowering the construction cost, and enabling supply of a large amount of power at low cost. The wave power generator has a structure wherein an air spring (4) of an elastic member supports elastically a heavy body (3) in a surrounding wall (2) on a floating body (1), and a power generating means (7) with an electromagnetic damper is installed between the heavy load (3) and the floating body (1). The spring constant of the air spring (4) is adjusted by means of auxiliary tanks preinstalled in a piston (6) and in the floating body (1) so that the undamped natural frequency of the air spring approaches the wave frequency within a predetermined range of the ratio omega/omega0 of the frequencies or agrees with the wave frequency. When the spring system vibration is made to resonate to the wave, the relative movement of the power generating means (7) becomes maximum. Thus, the power generation efficiency is improved to the full extent.