NOVELTY - The generator (100) has a case (10) for sealingly accommodating a power generation unit (40) that generates power by generating induced electromotive force in a coil through relative movement of a tubular permanent magnet and the coil. An upper end of a flexible tube (60) is connected to a lower end of an air supply pipe (90) such that the flexible tube communicates with the air supply pipe. Upper ends of the air supply pipe and a flexible suction pipe (70) are detachably coupled to caps (71, 91) and sealed by the caps, respectively.    USE - Wave activated power generator i.e. resonance type wave activated power generator, for use in a coastal area.    ADVANTAGE - The upper and lower elastic springs have an undamped natural frequency corresponding to an average frequency of waves on a coast where the generator is installed such that resonance occurs between the upper and lower elastic springs and a weight unit and an average vertical shifting amount of the weight unit is maximized, so as to efficiently maximize power capacity of the generator. The floating body is designed such that a mass is inserted into a lower portion of the floating body so that center of gravity is placed at center of the bottom of the floating body, and the floating body is vibrated up and down at a broader amplitude than the amplitude of the waves due to inertia of the mass so as to stably maintain an erect position of the generator. The generator is designed such that a heavy chain is inserted into the tube filled with air and placed in sea, where weight of the chain is reduced due to buoyancy and vertical shifting of the floating body is not disturbed by the weight of the chain. The cap is detached from the upper end of the air supply pipe to ventilate the tube via the air supply pipe, and the tube is picked up using a towing equipment when buoyancy of the tube is less than force with which a pile escapes from a sea bed, thus easily removing the pile from the sea bed. The tube is lifted above a water surface and placed on a hull, thus readily moving the generator to land or a ship for maintenance.    DETAILED DESCRIPTION - The generator comprises a set of upper elastic springs having upper ends in contact with an upper disk and lower ends in contact with an upper one of a set of carrier circular plates, and a set of lower elastic springs having upper ends in contact with a lower one of the carrier circular plates and lower ends in contact with a lower disk. The generator has a floating body that is vibrated up and down due to wave oscillation of a wave surface.    DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a wave activated power generator.    Case of wave activated power generator (10)    Power generation unit (40)    Flexible tube (60)    Flexible suction pipe (70)    Caps (71, 91)    Air supply pipe (90)    Wave activated power generator (100)