Tidal Current Power Generation System

PURPOSE: A power generation system using tidal current is provided to restrict a bad influence on an environment and generate a current semipermanently by generating power using tidal current. CONSTITUTION: A power generation system using tidal current comprises a base(2) fixed on the bottom of the sea, a plurality of supports(10) standing on the base, a plurality of cases(20) fixed at each of supports, a rotating blade part(30) which is arranged at a side of the case to be rotated by the tidal current and of which rotating shaft(36) is protruded to the inside of the case, and a generation part(40) airtightly built in the case and connected to the rotation shaft to generate current by the rotation of a blade(32).