PROBLEM TO BE SOLVED: To provide a manufacturing method capable of manufacturing a sheet fused body having a good touch feeling and proper seal strength of a seal edge part.SOLUTION: In a sheet fused body manufacturing method according to the present invention, a sheet laminate 10 is pressed and transferred using a pressure member 26 with being supported on a support member 21. In the manufacturing method according to the present invention, a laser beam 30 is irradiated from an irradiation head 35 to the sheet laminate 10 pressed and supported on the support member 21 along a support member side opening part 27, without a part of a component member of the sheet laminate 10 being irradiated, to form a temporary seal edge part 41t where a plurality of sheets, which are cut but connected at the part of the component member, are fused. In addition, in the manufacturing method according to the present invention, the part of the component member, without being cut, in the temporary seal edge part 41t is cut to form a seal edge part 41 to the sheet laminate 10 pressed and supported on the support member 21.SELECTED DRAWING: Figure 5
