The invention provides an image forming method for forming an image using a photothermographic material having an image forming layer on both sides of a support, wherein the image forming layer contains at least a photosensitive
silver halide, an organic silver salt, a
reducing agent for silver ions represented by the following formula (I), a coupler, and a binder: wherein R1, R2, R3, and R4 each independently represent a
hydrogen atom or a
substituent; R5 and R6 each independently represent an
alkyl group, an
aryl group, a heterocyclic group, an
acyl group, or a
sulfonyl group; R7 represents R11—O—CO—, R12—CO—CO—, R13—NH—CO—, R14—SO2—, R15—W—C(R16)(R17)(R18)—, R19—SO2NHCO—, R20—CONHCO—, R21—SO2NHSO2—, R22—CONHSO2— or (M)1 / nOSO2—; and M represents a cation having a valency of n. An image forming method using a photothermographic material which exhibits low
fog and excellent storage stability is provided.