PROBLEM TO BE SOLVED: To provide an ocean flow power generator in which its installation work and maintenance work in sea water can be easily carried out, a construction expenditure and an operation expenditure per output are less-expensive and energies of both normal and reverse ocean flows can be efficiently changed into electrical power.SOLUTION: Each of both ends of a wire 1 is provided with a float 2, respectively. Each of both ends of the wire 1 is provided with at least two connection wires 4A and 4B, respectively. Both ends of the wire 1 are connected to foundations 3 buried at the sea bottom, thereby the wire 1 is tensioned in the sea so as to cross substantially at a right angle with respect to the ocean current. A plurality of power generator units 10 are hung at the wire 1 through their connection parts and arranged there. The power generator units 10 are provided with at least one power generator including rotary blades and a power generator. The power generator units 10 can be oscillated around
