Apparatus for converting wave energy into electric power

~ The invention relates to a device for converting wave energy into electrical energy comprising a float element (1) closed and a mass member (2), the mass member (2) being disposed within the ~ buoyant member (1) and being movably mounted by report has the buoyant member (1), ~ mass member (2) being adapted to be in motion relative to the float element (1) under the action of the waves on the float element (1) characterized in that it also comprises locking means (13) capable of locking the movement of the mass member (2) and control means suitable for controlling the means lock (13) to selectively lock or release the mass-forming element (2) so as to amplify the movement of mass ~ member (2) by continuous adaptation of the dynamics of the device ~ waves.