NOVELTY - The generator has a supporting member (S) mounted on a base i.e. float (F). A movable member (M) e.g. spherical body (21), vibrating member, swinging member and rotating member, is supported by the supporting member to move in association with the base, and includes a dislocated center of gravity. A power generation unit (G) generates electric power with use of motion of the movable member. The base is placed on a surface of sea. The movable member vibrates within a vertical plane, reciprocatingly swings within the vertical plane and rotates within a horizontal plane.    USE - Electric power generator for use as a power source i.e. vibration source or a swing source, for an arbitrary structural body placed on a surface of sea for generating electric power with use of waves or vibrating motion/swinging motion of the structural body. Uses include but are not limited to a land vehicle, a boat, a beacon and a buoy provided with lighting.    ADVANTAGE - The generator allows the movable member, the float and the supporting member to be preferably utilized as a small facility of low capacitance. The supporting member has a supporting roller preferably shiftable along axial direction so as to allow the movable member to rotate along arbitrary directions. The supporting roller is provided with a bias member that biases the supporting roller to return to a central neutral position with an amount of shift along axial direction, so that the movable member can move more smoothly. The generator has a guard allowing the movable member to be partially exposed from an opening and inhibiting the movable member from excessively shifting upward due to the swinging motion of the float. The float has a sharpened portion at an end so as to easily face travel direction of waves. The generators are connected in series so that a line of the power generators is bendable upward, downward, right-ward and leftward.    DETAILED DESCRIPTION - The float includes shape selected from a group consisting of circular plate shape or rectangular shape.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of an entire structure of a power generator.    Float (F)    Power generation unit (G)    Movable member (M)    Supporting member (S)    Spherical body (21)    Guard (41)