We report a new type photochemical hole burning material; organic dye, zinc porphyrin, doped in inorganic semiconductor, titanium dioxide. The hole burning mechanism of this system is concluded to be photoionization via single‐photon process. The small temperature dependence of Debye–Waller factor was indicated by cyclic annealing experiment. A hole could be burned and observed at 140 K. ©1995 American Institute of Physics.