A heat developable photosensitive material having on a support a
non-photosensitive sliver salt, a photosensitive sliver halide, and a
binder, which has an image forming layer containing the photosensitive
sliver halide and comprises cyclic ketone or cyclic imine compound having
a specific structure in combination with a nucleation agent on the side
that the image forming layer is formed. This heat developable
photosensitive material is an excellent high contrast sensitive material
having a good stability.