The present invention relates to acrylonitrile compounds of formula (1): [wherein, R is a C1-C6 alkyl, a C3-C7 cycloalkyl optionally substituted by a C1-C4 alkyl, a naphthyl, etc., R1 is H, a halogen, a C1-C6 alkyl, etc., A is specific 5-membered aromatic heterocyclic ring containing two hetero atoms selected from N, O and S, etc., B is H, a C1-C4 alkyl, a C2-C4 alkoxyalkyl, etc.] Said compounds are useful as agricultural chemicals, in particular insecticides and acaricides.