In the title compound, C(16)H(16)N(2)O(4), the dihedral angle between the two benzene rings is 8.7 (2)°. The mol-ecule adopts an E configuration about the C=N bond, with an intra-molecular O-H⋯N hydrogen bond involving the hydr-oxy substituent and the hydrazide N atom. In the crystal structure, adjacent mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains propagating in the b-axis direction.