A process for production of a (1H-1,2,4-triazol-1-yl)benzene compound represented the general formula (5) [wherein R is a C1 to C6 alkyl group or a cyclic C1 to C6 alkyl group; A1 is a hydrogen atom, an amino group, a mono(C1 to C6 alkyl)amino group or a di(C1 to C6 alkyl)amino group; and A2 is a halogen atom, a C1 to C6 alkyl group or a cyclic C1 to C6 alkyl group], which comprises reacting a triazole compound represented by the general formula (2) (wherein A1 has the same definition as given above) with a phenylboronic acid compound represented by the general formula (3) (wherein R and A2 have the same definitions as given above) or a phenylboroxine compound represented by the general formula (4) (wherein R and A2 have the same definitions as given above) in the presence of a copper catalyst.