PROBLEM TO BE SOLVED: To provide a tool for preventing nesting of birds, which can reduce a cost with a simple structure and which can be easily attached.SOLUTION: A tool for preventing nesting of birds includes an attachment member 2 that is attached to a protruded member S above an electric pole, and a flexible member 3 that is supported by having an end 6 inserted into the attachment member 2.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】簡素な構造でコストを低減でき、かつ、取付けが非常に容易に行える鳥類営巣防止具を提供する。【解決手段】電柱の上方の突設部材Sに取着される取付部材2と、取付部材2に端部6を差し込んで支持される可撓線材3とを、備えている。【選択図】図1