The present invention relates to a wave power generator, and more specifically, to a wave power generator that can promote more aggressive investment and research activities by overcoming the uncertainties of natural environment through the relatively high energy conversion efficiency thereof, and enhance the practicality and the value thereof as a clean energy source by increasing the investment-to-efficiency rate. To this end, the present invention comprises: one or more raft vessels, each having in a central point thereof a node that moves freely according to wave height and leads a flow of fluid inside of the raft vessel with a constant water level; and an energy generating unit connected in series to a vertical axis C on a cross section of the node of each raft vessel and configured to generate energy using kinetic energy of the raft vessel.