PROBLEM TO BE SOLVED: To provide a mosquito coil in which a flame by igniting the mosquito coil goes out in a short time (specifically, within 30 seconds) spontaneously, and it is in the state of flameless combustion.SOLUTION: A mosquito coil containing a pest control component, contains borate of less than 5 mass%.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】蚊取り線香に着火した時の炎が短時間(具体的には、30秒以内)で自然に消炎し、無炎燃焼の状態となる自然消炎性の蚊取り線香を提供する。【解決手段】害虫防除成分を含有する蚊取り線香に、5質量%未満のホウ酸塩を含有させる。【選択図】なし