PROBLEM TO BE SOLVED: To provide an interval holding member for a bird-prevention thin line of an aerial line with an unprecedentedly novel configuration which can be reliably fixed to the bird-prevention thin line.SOLUTION: There is provided an interval holding member for a bird-prevention thin line of an aerial line which is attached to an aerial line such as a communication line and an electric line at a predetermined interval and is configured to prevent birds from staying on the aerial line by stringing a bird-prevention thin line. The interval holding member comprises a first member 1 fixed to an aerial line C and a second member 2 which is assembled into the first member by being assembled into a bird-prevention thin line S.COPYRIGHT: (C)2013,JPO&INPIT【課題】防鳥用細線に確実に止着でき、これまでにない斬新な構造の、架空線防鳥用細線の間隔保持材を提供する。【解決手段】通信線や電線等の架空線に所定間隔を存して取付け、防鳥用細線を張架して前記架空線に対する鳥類の留まりを防ぐようにした架空線の防鳥用細線の間隔保持材において、架空線Cに止着する第一部材1と、防鳥用細線Sに組付けて第一部材に組付ける第二部材2とで構成する。【選択図】図3