The present paper reviews recent progress for about 5 years (1969-1973) of cyanine dyes concerning 1) the utilization of them in photographic industries and 2) fundamental studies. 1) Utilization of them are classified as follows, briely; spectral sensitization of ordinary photographic emulsion, direct positive emulsion, inorganic and organic photoconductors, and also photographic characteristis, supersensitization (composed of various combinations.) 2) As for fundamental studies, they cover the following items: absorption-, luminescent-, massspectra, and aggregation of cyanine dyes.