The present invention relates to pest control agent having systemic activity and a high safety along with a wide insecticidal spectrum and excellent insecticidal activity, which are 1-aryl-3-cyano-5-pyridylalkylaminopyrazole derivatives represented by formula (1): ##STR00001## wherein X represents an N or C-halogen atom; R.sup.1 represents a haloalkyl group, excluding a perhaloalkyl group; R.sup.2 represents a hydrogen atom or an alkyl group, R.sup.3 represents a hydrogen atom, an alkyl group, or an acyl group; and R.sup.4 represents a hydrogen atom, a hydroxyl group, an alkyl group, a haloalkyl group, an alkoxy group, a haloalkoxy group, an alkylthio group, an alkylsulfinyl group, an alkylsulfonyl group, a halogen atom, a nitro group, or a cyano group.