PROBLEM TO BE SOLVED: To provide a folding device capable of suppressing that a sheet-like structure is folded at a position other than a contact position with a folding member.SOLUTION: A folding device comprises: a first conveying part that conveys a diaper S along a first path R1 in a state that the diaper S is sandwiched from both front and back sides, and has a guide-out port 10a provided at an end C of the first path a second conveying part that conveys the diaper S along a second path extending from the end C of the first path in a direction crossing the first path in the state that the diaper S is sandwiched from both front and back sides, and has a guide-in port 10b provided at a starting end C of a second path R2 a folding member 17 for folding the diaper S between the first conveying part and the second conveying part and a guide mechanism 4 for guiding the diaper S so that a tip of the diaper S guided out from the guide-out port 10a is guided to an opposite side of the second conveying part relative to an extension line R11 of the first path R1.COPYRIGHT: (C)2015,JPO&INPIT【課題】シート状構造物が折畳部材との接触位置以外の部分で折り畳まれるのを抑制することができる折畳装置を提供すること。【解決手段】おむつSが表裏両側から挟まれた状態でおむつSを第1経路R1に沿って搬送する第1搬送部であって、第1経路の終端Cに設けられた導出口10aを有する第1搬送部と、おむつSが表裏両側から挟まれた状態で、第1経路の終端Cから第1経路に交差する方向に延びる第2経路に沿っておむつSを搬送する第2搬送部であって、第2経路R2の始端Cに設けられた導入口10bを有する第2搬送部と、第1搬送部と第2搬送部との間でおむつSを折り畳むための折畳部材17と、導出口10aから導出されたおむつSの先端部が第1経路R1の延長線R11を基準として第2搬送部の反対側に導かれるようにおむつSを案内する案内機構4とを備えている。【選択図】図3