An image-forming method: by superposing a heat-sensitive transfer sheet on a heat-sensitive transfer image-receiving sheet so that a receptor layer can be contacted with a thermal transfer layer; and providing thermal energy in accordance with image signals; in which the heat-sensitive transfer image-receiving sheet comprises the receptor layer containing one of polyester and/or polycarbonate polymers, vinyl chloride polymers and/or a polymer latex; and in which the heat-sensitive transfer sheet comprises the thermal transfer layer containing a dye represented by formula (1) or (2): wherein, X141 represents an oxygen atom, a sulfur atom, or NR146; X142 represents a hydroxyl group, a mercapto group, or NHR147; R141 to R154 each represent a hydrogen atom or a substituent; A151 represents a group of atoms necessary to form a hetero ring together with the two carbon atoms; and n153 represents an integer of 0 to 4.