PURPOSE: Power generation equipment using sea level changes is provided to stably supply electricity regardless of the weather. CONSTITUTION: Power generation equipment using sea level changes comprises a water storage tank(100), a power generator(130), a containing tank(150), a regulating pulley(170), a regulating tank(190), and a drain tank(210). The water storage tank holds water flowing in the flood tide. The power generator generates electricity using the water dropping from the water storage tank. The containing tank temporally holds the sea water which is used for operating the power generator. The regulating pulley comprises first and second rotary bodies(173,175). The first rotary body interlocks with the first rotary body, and moving length of the outer surface of the second rotary body is longer than the first rotary body. The first and second regulating tanks(193,195) of the regulating tank are mounted on one and the other sides of the first rotary body, respectively. The seawater flows into the regulating tank in the flood tide. The first and second drain tanks of the drain tank are mounted on the one and the other sides of the second rotary body, respectively.
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