The optical limiting response of lead phthalocyanine in toluene solution for 532 nm, 23 ps laser pulses is reported and this result is compared with that of C60.The nonlinear property of lead phthalocyanine in the first excited singlet state measured by Z-scan technique is also demonstrated. The optical limiting response of lead phthalocyanine in toluene solution for 532 nm, 23 ps laser pulses is reported and this result was compared with that of C60. The nonlinear property of lead phthalocyanine in the first excited singlet state measured by Z-scan technique is also .