To provide a dry imaging material used in silver salt photothermography which is high in sensitivity but less in fogging and excellent in shelf life, especially stable in shelf life of the silver images after heat development.

Heat developable sensitive materials contain: non-photo-sensitive aliphatic carboxylic acid silver salt particles; photosensitive silver halide particles; a reducing agent which reduces the aliphatic carboxylic acid silver salt to silver when activated by heat; a binder; and a cross-linking agent of this binder. This dry imaging material of this invention for the silver salt photothermography contains photosensitive silver halide particles which change from a surface latent image to an inside latent image in the process of the heat development and whose surface sensitivity drops to 1/2 of the sensitivity before the development, and which contain at least one kind of the transition metals chosen from the elements of the six to 11 groups in the periodic table of the elements.