Homogeneous thin films of phthalocyanine compound were prepared by vapor deposition method and were found to be writable with He-Ne laser beam on phthalocyanine (MPc) films. The threshold irradiation time for writing the recording spots was 250 ns with He-Ne laser of 7.8 mW power at the wavelength of 632.8 nm. This indicates that the reflectance of MPc films is about 20% and the absorptance are falls in 550 to 900 nm. The relationship between the structure and optical storage properties were discussed. The laser power and irradiation time increase as the in side chain phthalocyanine molecule increases.