To provide a bird damage prevention tool which facilitates an installation operation to a wire in delivery time and even in a work time at a high place.SOLUTION: A bird damage prevention tool comprises: a pair of fixing support tools (F) each of which is attached to a wire (W) installed between power poles; a free support tool (S) which is attached in a state of capable of oscillating around a wire between the fixing support tools (F),(F); and a striatal (L) extended to the upper sides of the fixing support tools (F) and the free support tool (S). By holding a connection piece (16) extended horizontally from the free support tool (S) by wire fixing mechanisms (C) of the fixing support tools (F), the fixing support tools (F) and the free support tool (S) are integrated, the integrated state is maintained until an attachment work to the wire (W) is performed.SELECTED DRAWING: Figure 2【課題】配送時は勿論、高所での作業時にでも、電線への設置作業が容易になる鳥害防止器具を提供することを目的とする。 【解決手段】電柱間に架設された電線(W)に各々取り付けられる一対の固定支持具(F)と、当該固定支持具(F)・(F)間で電線周りに揺動自在な状態で装着される自由支持具(S)と、固定支持具(F)と自由支持具(S)の上側に架け渡される線条体(L)とで構成されている。 自由支持具(S)から水平に連出した連結片(16)を固定支持具(F)の電線固定機構(C)で挟持することで、固定支持具(F)と自由支持具(S)とを一体化させ、電線(W)への取り付け作業時まで一体化を図っている。【選択図】 図2