JIGSAW PUZZLE

PURPOSE:To form a jigsaw puzzle without making marks of cutting lines in a back sheet by forming the cutting lines in a surface sheet and a thick board after applying the surface sheet on an upper surface of the thick board, and applying the back sheet on a lover surface of the thick board and on the outer side of a piece containing recessed part. CONSTITUTION:A jigsaw puzzle comprises a thick board 11, a thin surface sheet 13 applied on an upper surface of the thick board 11, and a thin back sheet 21 applied on a lower surface of the thick board 11, and a piece containing recessed part 17 is separated on the inner side of cutting lines 31, 35 formed in the surface sheet 13 and the thick board 11. Pieces 19 are formed at a part in the surface sheet 13 and a part of the thick board 11 positioned inside the piece containing recessed part 17. By thus forming the cutting lines 31, 35 in the surface sheet 13 and the thick board 11, and then applying the back sheet 21 on the lower surface of the thick board 11 and on the outer side of the piece containing recessed part 17, the jigsaw puzzle can be formed without forming marks of the cutting lines 31, 35 in the back sheet 21.