A heat development color photographic material excellent in discrimination and raw preservability of images, which comprises a support, and at least a light-sensitive silver halide, a binder, a coupler and a reducing agent formed thereon, in which a 2-acylamino-4-sulfonamidophenol derivative represented by the following general formula (I) is contained as said reducing agent: ##STR1## wherein R.sub.1 represents a substituent group (for example, alkyl or aryl); R.sub.2 to R.sub.4 each represents hydrogen or a substituent group (for example, halogen, alkyl or aryl); and R.sub.5 represents a substituent group (for example, alkyl or aryl).