A triazole compound of general formula (I) and an insecticide containing the same as the active ingredient, wherein R₁ represents hydrogen or lower alkyl; R₂ represents lower alkyl; R₃ represents alkyl, alkenyl, cycloalkylmethyl or haloalkyl, alkyl, alkenyl, hydroxyalkyl, thioxyalkyl or carbonylalkyl each substituted with an optionally substituted phenyl, alkyl substituted with alkoxy or alkylthio, alkyl substituted with alkylsulfinyl or alkylsulfonyl, alkyl substituted with α-, β- or γ-pyridyl, alkyl substituted with α- or β-thienyl optionally substituted with halogen, alkyl substituted with cyano, or alkyl substituted with alkoxycarbonyl; and R₄ represents (a) wherein R₅, R₆ and R₇ represent the same or different alkyl or otherwise two of the R₅, R₆ and R₇ may form a carbocyclic ring.