Acaricidal composition

A method for exterminating house dust acari, which comprises applying to an area or space infested with accari an acaricidal composition consisting essentially of one or more compounds selected from the group consisting of methyl cinnamate, ethyl cinnamate, n-propyl cinnamate, isopropyl cinnamate, n-butyl cinnamate, isobutyl cinnamate isoamyl cinnamate, n-hexyl cinnamate, allyl cinnamate, cinnamyl acetate, cinnamyl propionate, cinnamyl n-butyrate, cinnamyl isobutyrate, p-cresyl acetate, p-cresyl butyrate, p-cresyl isobutyrate, p-methylbenzyl propionate, .beta.-phenoxyethyl alcohol, phenoxyethyl acetate, phenoxyethyl propionate, phenoxyethyl n-butyrate, phenoxyethyl isobutyrate, methyl phenylacetate, ethyl phenylacetate, dibenzyl ether, heliotropin, methyl diphenyl ether and 2-methyl-1-(methylbicyclo[2.2.1]hept-5-en-2-yl)-1-penten-3-ol as an active ingredient to a portion where dust acari inhabit, wherein the composition is applied in a dose of approximately 80 mg or more per m.sup.2 of the area to be treated or approximately 8 mg or more per m.sup.3 of the space to be treated.