In crop production in the fields of agriculture, horticulture and the like, the damage caused by insect pests etc. is still immense, and insect pests resistant to existing insecticides have emerged. The present invention has been made in view of such circumstances, and an object of the present invention is to develop and provide a novel agricultural and horticultural insecticide. The present invention provides a benzimidazole compound represented by the general formula (1): {wherein R1 represents a hydrogen atom or a cyano group, R2 and R3 each represent a hydrogen atom, R4 represents a hydrogen atom or a haloalkoxy group, R5 represents a haloalkoxy group, a haloalkylthio group, a haloalkylsulfinyl group, or a haloalkylsulfonyl group, and m represents 0 or 2}, or a salt thereof; an agricultural and horticultural insecticide comprising the compound or the salt as an active ingredient; and a method for using the insecticide.