Photothermographic material

A photothermographic material comprising a light-sensitive silver halide, an organic silver salt, a reducing agent, a thiuronium salt and a binder, wherein the photothermographic material comprises at least one of compounds represented by the following formula (1), (2) and (3):

• wherein R represents a univalent substituent and m is an integer of 1 to 4, provided that two adjacent Rs may combine with each other to form an aliphatic ring, aromatic ring or heterocyclic ring;
• R1 and R2 each represent a hydrogen atom or a univalent substituent;
• wherein Z represents a non-metallic atom group necessary to form an aromatic heterocyclic 5-membered ring;
• R1 and R2 each represent a hydrogen atom or a univalent substituent;
• wherein T represents a univalent substituent;
• k is an integer of 1 to 4 said thiuronium salt is represented by the following formula (4):
• wherein H31Ar represent an aromatic hydrocarbon group or an aromatic heterocyclic group;
• T31 represents a bivalent aliphatic hydrocarbon linkage group or a direct bond;
• J31 represents a bivalent linking group containing at least one of an oxygen atom, sulfur atom and nitrogen atom, or a direct bond;
• Ra, Rb, Rc and Rd each represent a hydrogen atom, an acyl group, an aliphatic hydrocarbon group, an aryl group or a heterocyclic group, or Ra and Rb, Rc and Rd, Ra and Rc, or Rb and Rd combine with each other to form a nitrogen containing ring;
• M31 represents an ion necessary to neutralize an intramolecular charge;
• and k31 represents the number of the ion necessary to neutralize an intramolecular charge.