Transfer method

A transfer method comprising:

• a disposing step of disposing a transfer sheet and a medium in an inside of a sealed space, wherein the sealed space is formed by using a pressure welding sheet having flexibility in at least one part, and the transfer sheet and the medium are disposed so that an adhesive layer of the transfer sheet and a transfer layer of the transfer sheet are layered, and the adhesive layer has a thermally melting property, and the adhesive layer is contacted with the medium;
• a pressure welding step of suctioning the inside of the sealed space by a negative pressure and pressure welding the pressure welding sheet and the medium by the negative pressure to closely attach the transfer sheet and the medium;
• an irradiating step of softening the adhesive layer by irradiation of a light ray generated from a light source in a state in which the transfer sheet is closely attached to the medium by the pressure welding sheet and adhering the adhesive layer to the medium by a pressure welding force from the pressure welding sheet;
• and
• a peeling step of peeling off the transfer sheet from the medium after the irradiating step.