Provided is an organism adhesion suppression method in which the adhesion of organisms in water is suppressed, the organism adhesion suppression method comprising: a preparation step (S10) in which an organism adhesion suppression target member that is immersed in water and formed from a copper alloy serves as a cathode, and an anode member which constitutes the opposite pole of the organism adhesion suppression target member is immersed and disposed in the water; and an energization step (S12) in which a DC current is supplied between the organism adhesion suppression target member and the anode member.
