A Wave Power Device

The invention relates to a wave power device for extracting energy from water waves. The wave power device comprises at least one substantially stationary member and a plurality of resistance elements movably connected to and along the length of the substantially stationary member for example such that the resistance elements are movable with a maximal travelling distance due to force applied to the resistance element by water waves when the wave power device is in use. At least one of the resistance elements has a resistance element area and a resistance surface area, where the resistance surface area is defined as a projection of the resistance element area to a plane perpendicular to the length axis of the substantially stationary member. The resistance surface area is variable, for example automatically, semi automatically and/or manually adjustably e.g. in relation to the force applied Preferably the movement of the resistance elements generates energy which is extracted by converting the movement of the resistance elements to a transferable energy. The invention also relates to a wave power system and a method of extracting energy from waves of waters.