The purpose of the present invention is to provide a flexible manipulator that can: suppress inter-lumen variation in the path lengths of wires, even when an insertion part has curved； and maintain the controllability of a mobile part. This flexible manipulator (1) comprises: an oblong, flexible insertion part (2)； a mobile part (3) that is attached to a tip end of the insertion part； a drive part (4) that is attached to a base end of the insertion part and generates motive force； and a long, narrow motive force transmission member (5) that transmits said motive force to the mobile part. The insertion part comprises: an oblong, flexible core member (7)； and a plurality of ring plate members (8) that are fixed at intervals in the longitudinal direction of the core member. Each ring plate member comprises: a center hole (9) through which the core member is passed； and a plurality of through holes (10) that are arranged around the center hole at intervals in the circumferential direction. The motive force transmission member is arranged in a spiral as a result of being sequentially passed from one ring plate member to the next in the longitudinal direction through through holes that are at different positions in the circumferential direction.L'invention a pour objet de fournir un manipulateur souple qui est tel qu'une partie insertion est fléchie et une modification de longueur de parcours d'un câble dans l'espace d'une lumière est inhibée, et qui permet d'empêcher une baisse des propriétés de commande d'une partie mobile. Le manipulateur souple (1) de l'invention est équipé : de la partie insertion (2) allongée flexible ； de la partie mobile (3) installée à une extrémité avant de la partie insertion ； d'une partie entraînement (4) installée à une extrémité de base de la partie insertion, et générant une force motrice ； et d'un élément de transmission de force motrice (5) fil et long qui transmet la force motrice ainsi générée à la partie mobile. La partie insertion es
