An individual sheet overlapping mechanism for overlapping a first individual sheet on a second individual sheet, the first individual sheet being conveyed from an upstream side and the second individual sheet being conveyed thereafter and having a length in a conveying direction which is longer than a length in the conveying direction of the first individual sheet, the individual sheet overlapping mechanism comprising: a holding cylinder (32, 34) that includes a paper edge holding mechanism (32a, 34a) capable of holding a front edge portion in the conveying direction of the first individual sheet and that is provided rotatably along the conveying direction of the first individual sheet, the holding cylinder (32, 34) being configured to wrap the first individual sheet that has reached said holding cylinder (32, 34) around said holding cylinder (32, 34) by the paper edge holding mechanism (32a, 34a), release said first individual sheet at a timing when the second individual sheet has reached said holding cylinder (32, 34), and stack said first individual sheet on said second individual sheet, wherein the individual sheet overlapping mechanism is characterized as being an individual sheet overlapping mechanism for overlapping each first individual sheet of a plurality of the first individual sheets conveyed continuously from the upstream side on each second individual sheet of a plurality of the second individual sheets conveyed continuously thereafter, wherein the same number of the holding cylinders (32, 34) as the number of continuously conveyed first individual sheets are provided along a conveying path of the first individual sheet and each of the holding cylinders (32, 34) holds one each of the first individual sheets and stacks the first individual sheet on each of the second individual sheets, thereby configuring the holding cylinder (32, 34) to produce the same number of stacked bodies as the number of continuously conveyed first individual sheets. a holding cylinder (32, 34) that includes a paper edge holding mechanism (32a, 34a) capable of holding a front edge portion in the conveying direction of the first individual sheet and that is provided rotatably along the conveying direction of the first individual sheet, the holding cylinder (32, 34) being configured to wrap the first individual sheet that has reached said holding cylinder (32, 34) around said holding cylinder (32, 34) by the paper edge holding mechanism (32a, 34a), release said first individual sheet at a timing when the second individual sheet has reached said holding cylinder (32, 34), and stack said first individual sheet on said second individual sheet, wherein the individual sheet overlapping mechanism is characterized as being an individual sheet overlapping mechanism for overlapping each first individual sheet of a plurality of the first individual sheets conveyed continuously from the upstream side on each second individual sheet of a plurality of the second individual sheets conveyed continuously thereafter, wherein the same number of the holding cylinders (32, 34) as the number of continuously conveyed first individual sheets are provided along a conveying path of the first individual sheet and each of the holding cylinders (32, 34) holds one each of the first individual sheets and stacks the first individual sheet on each of the second individual sheets, thereby configuring the holding cylinder (32, 34) to produce the same number of stacked bodies as the number of continuously conveyed first individual sheets.