PROBLEM TO BE SOLVED: To construct a termite-preventing structure by filling a gap portion formed in an abutting portion of an underfloor structure with a termite-preventing agent-containing paste, and to prevent the termite-preventing structure from being reconstructed. (EN) Provided is an anti-termite construction method capable of efficiently completing a work by a simple work without lowering the ant effect. SOLUTION: The ant-repellent construction method of the present embodiment is performed by filling a gap formed at the contact portion of the underfloor structure with an anti-termite agent-containing paste to construct a first ant-repellent structure, When reconstructing the ant structure one or more times, replace the ant structure with the ant structure with the amount of the ant-repellent-containing paste in an amount equivalent to the rate of ant-repellent disappearance in the area where the ant structure was built up to the previous time. Apply so as to cover, and re-apply the second and subsequent termite-proof structures. [Selection diagram] Fig. 4【課題】床下構造体の当接部に形成される隙間部に、防蟻剤含有ペーストを充填して防蟻構造を構築した後、防蟻構造を再施工する必要が生じたときに、防蟻効果を低下させることなく、簡単な作業で効率良く作業を完了できるような防蟻施工方法を提供する。【解決手段】本実施形態の防蟻施工方法は、床下構造体の当接部に形成される隙間部に、防蟻剤含有ペーストを充填して1回目の防蟻構造を構築した後、防蟻構造を1回以上再施工するに際し、前回までの防蟻構造を構築した領域での防蟻剤消失率に相当する量の防蟻剤含有ペーストで、前回の防蟻構造を構築した領域を覆うようにして塗布し、2回目以降の防蟻構造を再施工する。【選択図】図4