The effect of nonionic surfactant micellar (Triton X–100) on the sensitive, simple and inexpensive, spectrophotometric method was developed for the determination of lead (II) with isonitriso p-isopropyl acetophenone phenyl hydrazone (HIPAPH). Lead was complexed with isonitriso p-isopropyl acetophenone phenyl hydrazone (HIPAPH) in presence of non ionic surfactant micellar (Triton X–100). Absorption spectrum of Pb- HIPAPH complex in the presence of non ionic surfactant1 medium shows a peak at 390 nm. The molar absorptivity of the complex was 5.6734x104 dm3.mole-1.cm-1 and Sandell’s sensitivity was 2.2367x10-3mg.cm-2. The system obeys Beer’s law in the concentration range of 0.25 to 15.0ppm. The composition of the complex (metal: ligand) was 1:2. The method was employed for the determination of lead in industrial effluents and ground water samples.