Heat-developable photosensitive material and image-forming process

A heat-developable photosensitive material comprising, on one surface of a support, at least one photosensitive silver halide, a reducing agent for silver ions, a binder, non-photosensitive organic silver salt particles, and at least one development accelerator,

• the non-photosensitive organic silver salt particles including silver behenate in a content of from 90% by mole to 99.9% by mole based on the non-photosensitive organic silver salt particles,
• wherein the development accelerator is a compound in which, when added in an amount of 5% by mole relative to the reducing agent, exposure amount required to obtain an optical density=1.0 is reduced to 90% or less, as compared to the case where the compound is not added,
• wherein the development accelerator comprises at least one of compounds represented by the following formulae (1) and (4):
• wherein, in formula (1):
• R1 represents an alkyl group, aryl group, alkenyl group, heterocyclic group, acyl group, alkoxycarbonyl group, carbamoyl group or alkynyl group;
• X1 represents an acyl group, alkoxycarbonyl group, carbamoyl group, sulfonyl group or sulfamoyl group;
• and Y1, Y2, Y4 and Y5 each independently represents a hydrogen atom or a substituent, and
• in formula (4):
• X1d represents a substituent;
• X2d, X3d and X4d each independently represents a hydrogen atom or a substituent;
• none of X1d, X2d, X3d and X4d is a hydroxy group;
• X3d is not a sulfonamide group;
• substituents represented by X1d, X2d, X3d and X4d may be bonded to each other to form a ring;
• and R1d represents a hydrogen atom, alkyl group, aryl group, heterocyclic group, amino group or alkoxy group.