The title compound, C(13)H(11)BrN(2)O, a hydroxy-amidine derivative (an amidoxime), was obtained by addition of the corresponding imidoyl chloride to hydroxy-lamine. The benzene and phenyl rings are twisted from the mean plane of the hydroxy-amidine group by 34.4 (1) and 59.2 (1)°, respectively. In the crystal structure, inter-molecular O-H⋯N hydrogen bonds link pairs of mol-ecules, forming centrosymmetric dimers.