To prevent pigeon from sticking to a veranda on a floor surface of a corner portion of a veranda in an empty room, to prevent making a nest and to prevent a pigeons nest such as an offensive odor due to pigeon feces Provide a preventive tool for preventing sticking of doves that can effectively prevent adverse effects caused by making.SOLUTION: The piggyback preventing device 1 comprises a frame 2 formed in a size capable of being laid on the floor surface of a corner portion of a veranda in an empty room, a resin yarn obliquely crossing the opening portion 3 of the frame body 5 is stretched to the upper surface side of the frame body in a state in which the interval of such a degree that the walking of the pigeon becomes difficult and at a distance away from the floor surface to such an extent that the walking of the pigeon becomes difficult .BACKGROUND OF THE INVENTION【課題】空き部屋のベランダの隅部の床面に敷いて設置するだけで、このベランダに鳩をよりつかないようにし巣を作ることを防止して、鳩の糞による悪臭等の鳩の巣作りに因る弊害を効果的に防止できる鳩のよりつき防止具を提供する。【解決手段】鳩のよりつき防止具1は、空き部屋のベランダの隅部の床面に敷いて設置できる大きさに形成した枠体2に、枠体の開口部3を斜めに横切る樹脂糸5を鳩の歩行が困難となる程度の間隔を設けた状態で且つ鳩の歩行が困難となる程度に床面から離間させた状態で枠体の上面部側に張着して構成されている。【選択図】図1