Photothermographic material

A photothermographic material having an image-forming layer that contains a non-photosensitive silver salt of an organic acid, a photosensitive silver halide, a nucleating agent and a binder on at least one side of a support, wherein the material contains a compound represented by the formula (1) and the nucleating agent consists of at least one compound represented by the following formula (A), (B) or (C)

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• wherein, in the formula (1), P represents an oxygen atom, a sulfur atom or NH, Q represents an oxygen atom or a sulfur atom, Y represents OH, OM (M represents a counter ion) or NH2, L represents a divalent bridging group, and Z represents an alkyl group, an aryl group or a heterocyclic group;
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• wherein, in the formula (A) or (B), Z1 and Z2 each represent a nonmetallic atomic group that can form a 5- to 7-membered ring structure including Z1 or Z2, Y1 and Y2 each represent —C(═O)— group or —SO2— group, X1 and X2 each represent hydroxy group or a salt thereof, an alkoxy group, an aryloxy group, a heterocyclyloxy group, mercapto group or a salt thereof, an alkylthio group, an arylthio group, a heterocyclylthio group, an amino group, an alkylamino group, an arylamino group, a heterocyclylamino group, an acylamino group, a sulfonamido group or a heterocyclic group, and Y3 represents a hydrogen atom or a substituent, and wherein, in the formula (C), Z3 represents an alkyl group which may have one or more substituents, an aryl group which may have one or more substituents or a heterocyclic group which may have one or more substituents, W represents an aryl group which may have one or more substituents or an alkyl group substituted with an electron-withdrawing group, and M represents a counter cation.