PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing a sheet-fused body, which is capable of efficiently producing a high-quality sheet-fused body with high laser beam irradiation accuracy. SOLUTION: A pressure head 26 has a light passage portion 210 through which a laser beam 30 can pass on a surface 265A facing a first surface 21a of a support member 21, and a belt-shaped sheet stack which is a workpiece. When the body 10 is pressed, the light passing portion 260 of the pressing head 26 is temporarily overlapped on the first surface 21 a of the supporting member 21 via the sheet laminated body 10 so that the light passing portion 260 of the pressing head 26 overlaps the light passing portion 210 of the supporting member 21. The sheet laminated body 10 is sandwiched and fixed in cooperation with the supporting member 21 in the overlapping state, and pressure is applied to the supporting member 21. At least one of the support member 21 and the pressure head 26 has a position regulation mechanism for maintaining the overlapping state when the sheet laminate 10 is pressed. [Selection diagram] Fig. 11【課題】レーザー光の照射精度が高く、高品質のシート融着体を効率良く製造し得るシート融着体の製造装置を提供すること。【解決手段】加圧ヘッド２６が、支持部材２１の第１面２１ａとの対向面２６５Ａに、レーザー光３０が通過可能な光通過部２１０を有し、且つ被加工物である帯状のシート積層体１０の加圧時には、加圧ヘッド２６の光通過部２６０が支持部材２１の光通過部２１０と重なるように、支持部材２１の第１面２１ａにシート積層体１０を介して一時的に重ねられ、その重なり状態における支持部材２１と協働してシート積層体１０を挟持固定しつつ支持部材２１に向けて加圧するようになされている。支持部材２１及び加圧ヘッド２６の少なくとも一方が、シート積層体１０の加圧時における前記重なり状態を保持するための位置規制機構を有する。【選択図】図１１
