To form a transfer layer on a base material to be transferred of an uneven shape, especially, a three-dimensional uneven shape.

For a method to transfer a transfer layer to a base material B to be transferred having an uneven shape, using a transfer sheet S wherein a transfer layer is provided on a supporting body sheet, in a mixed particle tank where a large particulate diameter high specific gravity particle Pb and a small particulate diameter low specific gravity particle Ps, as solid particles P, are mixed and stored, the base material to be transferred of which the surface to be transferred faces downward, is pushed into the mixed particle tank from the top to the bottom with the transfer sheet of which the transfer layer side faces upward, being inserted between the base material to be transferred and the mixed particles, while applying vibration to either one or both of the solid particles and the base material to be transferred, and thus, a transfer pressure is applied, and the transfer is performed.