In order to provide a continuous body folding device and a folding method which facilitate the stabilization of the actions for folding a continuous body, the present invention is provided with: a conveying part having a moving surface that moves while suctioning and holding a first region (2a) of a continuous body (2), the conveying part conveying the continuous body (2) in the longitudinal direction of the continuous body (2) a first folding reference part (30) in which a first endless belt (31), which moves in a first circulatory pathway along a first virtual plane including the moving surface, moves along a first reference segment (31x) adjacent to a virtual line (2x) of the continuous body (2) in the same direction and at the same speed as the moving surface and first guiding members that are disposed along the first reference segment (31x), contact a second region (2b) of the continuous body (2), and folds the continuous body (2) along the virtual line (2x) and moves the second region (2b) toward the first region (2a) so that the angle formed by the first region (2a) and the second region (2b) in the cross-section perpendicular to the virtual line (2x) of the continuous body (2) becomes smaller as the continuous body (2) is conveyed downstream in the conveying direction.La présente invention concerne un dispositif de pliage de corps continu et un procédé de pliage associé qui facilitent la stabilisation des actions de pliage du corps continu, le dispositif de la présente invention étant pourvu des éléments suivants : une partie de transport comportant une surface mobile qui se déplace tout en aspirant et en maintenant une première région (2a) dun corps continu (2), la partie de transport transportant le corps continu (2) dans la direction longitudinale du corps continu (2) une première partie de référence de pliage (30) dans laquelle une première courroie sans fin (31), qui se déplace dans une première voie de circulation le long dun premier plan virtuel comp
