A wave powered electricity generator is provided. Waves are separated from a floating platform unit by using a partition plate unit so that the floating platform unit enclosed by the partition plate unit is almost no wave. The waves outside the partition plate unit are to move many floating ball units up and down so that the racks provided on each of the floating ball units are capable of rotating the gears extending from the floating platform unit, and the rotational forces of gears are regulated through ratchets and consolidated to produce a power for driving generators. The racks on the floating ball units and the gears on the floating platform unit are pulled together by using springs. The resilient force of the two springs simultaneously helps the rack's ‘up and down’ in smooth reciprocating motion. Then the gears directly and indirectly output a force to drive generators.