NOVELTY - The converter (20) has a region (22) opened towards water (10) with a wave motion (11). A movable planar pressing force retainer (24) i.e. float body, is provided with a side (25) turned towards the water and another side (27) turned away from the water. An electrical-mechanical converter module (28) i.e. electroactive polymer part (30), is mechanically coupled with the pressing force retainer. The converter module converts an independent movement of the pressing force retainer into electric voltage. The electroactive polymer part is formed as a stack arrangement (32).    USE - Wave energy converter for a floating wave energy power plant installed at a coast (all claimed) to generate electrical power.    ADVANTAGE - The electroactive polymer part is formed as the stack arrangement, thus increasing the yield of electrical power, which is achieved from the wave motion. The utilization of the force retainer i.e. float body, ensures an efficient, simple and inexpensive installation of the wave energy converter at the coast. The force retainer is maintenance-free and uses large hydrostatic forces with small wave motion to achieve high energy output of the converter. The electroactive polymer part is manufactured in an inexpensive manner. The design of the converter ensures simple maintenance of the converter and achieves high efficiency during conversion of the wave energy into the electrical power. The float body is accessed, maintained and replaced in an easy manner.    DETAILED DESCRIPTION - The electroactive polymer part is designed as dielectric-, piezoelectric-, electrostrictive-, ionic-, liquid crystal polymer-, electrostrictive graft polymer-, electrorheological fluid- or ionic polymer metal composite parts.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of a wave energy converter.    Water (10)    Wave motion (11)    Wave energy converter (20)    Region (22)    Movable planar pressing force retainer (24)    Sides of force retainer (25, 27)    Electrical-mechanical converter module (28)    Electroactive polymer part (30)    Stack arrangement (32)