Photothermographic material

A photothermographic material comprising a support having disposed on one surface thereof, an image forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, and at least one protective layer, wherein 50% by mass or more of the binder contained in the image forming layer is a water soluble binder, and wherein the material contains at least one of spectral sensitizing dyes represented by the following general formulae (D-a)-(D-d):

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• wherein, in the formulae, Y1, Y2 and Y11 each represent an oxygen atom, a sulfur atom, a selenium atom or a group —CH═CH—;
• L1-L9 and L11-L15 each represent a methine group;
• R1, R2, R11 and R12 each represent an aliphatic group;
• R3, R4, R13 and R14 each represent a lower alkyl group, a cycloalkyl group, an alkenyl group, an aralkyl group, an aryl group or a heterocyclic group;
• W1, W2, W3, W4, W11, W12, W13 and W14 each represent a hydrogen atom or a substituent, represents a group of non-metal atoms necessary to form a condensed ring by linking between W1 and W2, W3 and W4, W11 and W12 or W13 and W14, or represents a group of non-metal atoms necessary to form a 5-membered or 6-membered condensed ring by linking between R3 and W1, R3 and W2, R13 and W11, R13 and W12, R4 and W3, R4 and W4, R14 and W13 or R14 and W14;
• X1 and X11 each represent an ion necessary to balance the charge in the molecule, k1 and k11 each represent the number of ions necessary to balance the charge in the molecule;
• m1 represents 0 or 1;
• and n1 and n2, or n11 and n12 each represent 0, 1 or 2;
• and n1 and n2, or n11 and n12 do not all simultaneously represent 0.