A multicolor image-forming material comprising: an image-receiving sheet comprising
a support and an image-receiving layer; and at least four thermal transfer sheets
each comprising a support, a light-to-heat converting layer and an image-forming
layer, and each having a different color, wherein an image is formed by the method
comprising the steps of: superposing each one of the at least four thermal transfer
sheets on the image-receiving sheet to be in a state of the image-forming layer
being in contact with the image-receiving layer; and irradiating the thermal transfer
sheet with a laser beam to transfer an image in an area of the image-forming layer
subjected to irradiation onto the image-receiving layer, and at least one layer
selected from layers comprised in the image-receiving sheet and the at least four
thermal transfer sheets comprises a fluorine-series surface active agent which
is a homopolymer comprising a polymerizable monomer represented by the formula
(1) and having a weight average molecular weight Mw of 3000 or more.
