PROBLEM TO BE SOLVED: To provide a viscous fluid fixture capable of improving the reliability of a countermeasure against intrusion of small animals, reducing an operation time required for attaching a small animal intrusion prevention agent, and improving the efficiency of operations required for attaching the agent.SOLUTION: A viscous fluid fixture 100 comprises: a viscous fluid holding part 110 that comprises an uneven surface and is made from a material having flexibility which causes it to deform in accordance with an external force being applied while maintaining a deformed form and an attachment part 120 that is provided at the viscous fluid holding part 110 and has a shape of strips. Thus, a small animal intrusion prevention agent before hardening can be reliably held at a certain position until it hardens.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】小動物侵入防止対策の信頼度向上を図るとともに、小動物侵入防止剤の取付作業にかかる作業時間を短縮することができ、取付作業にかかる作業効率の向上を図ること。【解決手段】表面に凹凸を備え、加えられた外力に応じて変形するとともに変形した形状を維持する可撓性を有する材料を用いて形成された粘性流体保持部110と、粘性流体保持部110に設けられて紐形状をなす取付部120と、を備えた粘性流体取付具100を構成した。これにより、硬化する前の小動物侵入防止剤を硬化するまで一定の位置において確実に保持することができる。【選択図】図1