The present invention but by the flow of seawater in accordance with the waves and swell is formed by a wind blowing on offshore producing electricity, installed on offshore structures reciprocating caused by the relative motion between the float and the offshore structure in a rotational movement conversions relates to a surface wave generation device which drives a generator,
A water wave power generator is installed on a marine structure (1), arranged in a grid pattern on the sea surface, and a plurality of the float 10 to be elevated independently by each wave; And it made of a rack member 21 and the pinion 25 which is meshed thereto which is connected to the bottom of said float (10), a plurality of power conversion mechanism 20, which is installed in the sea; And power generation unit 40 to generate electricity using the rotation force is installed at one side of the marine structure (1); Characterized in that the containing; set the rotational motion of the pinion (25) provided in each of the power conversion mechanism 20 into a rotational motion by power transmission section 30 to pass to the power generation unit 40.