To provide an intrusion prevention system of a pest animal which can stop infestation of pest animals against a specific compartment such as a kitchen and can maintain the effect even by repeated use.SOLUTION: The floor surface 2 provided with the drainage port 3 and provided with a gradient toward the drainage port and the floor surface 2 provided at the end portion on the upstream side of the gradient of the floor surface 2 and continuous to the floor surface 2 A supply pipe 4 for releasing the foam in a bubble-like state, a bubble generating section 5 for generating a foam and feeding it to the supply pipe 4, and a bubble generating section 5 for generating a foamy substance so as to maintain a state where the floor surface 2 is covered with no foam A control section 6 for controlling the bubble generating section 5, a first timer 8 capable of setting a covering time of the floor surface 2 with a foam-like substance, and a floor surface 2 is rinsed after a lapse of a set time period by the first timer 8 And a water discharge pipe 4.BACKGROUND OF THE INVENTION【課題】厨房等の特定区画に対する害虫獣の侵入を食い止めることができ、しかも繰り返し使用しても効果を持続することが可能な害虫獣の侵入防御システムを提供する。【解決手段】排水口3が設けられると共に当該排水口に向けて勾配が設けられた床面2と、床面2の勾配の上流側の端部に設けられると共に当該床面2に対して連続的に泡状物を放出する供給管4と、泡状物を生成して供給管4に送り込む泡発生部5と、床面2が泡状物によって隙間なく覆われた状態を維持するように泡発生部5を制御する制御部6と、泡状物による床面2の被覆時間を設定可能な第一のタイマー8と、第一のタイマー8による設定時間の経過後に床面2を水洗する放水管4と、を備えている。【選択図】図1
