Tidal current power generator

PURPOSE: A tidal power generator is provided to reduce the manufacturing cost and maintenance cost by controlling only flap part and generating energy with a simple structure. CONSTITUTION: A tidal power generator(1000) comprises a rail(100), a slide unit(200) and a flap rudder(300). The slide unit is supported in the rail to be able to slide. The flap rudder comprises a rudder part(310) and a flap part(320). The rudder part is supported in the slide unit and is rotated about the center section. The flap part is connected to the end part of the rudder part. The rotation of the flap part is controlled.