This medical device system comprises: a longitudinal axis member which has a longitudinal axis, has an inner space extending along the longitudinal axis, and is provided along the longitudinal axis; an insertion section provided in the inner space so as to be movable in the longitudinal axis direction and having a bendable bending section; an operation section for operating the bending section; a first operation member connected to the operation section and causing drive force for the bending section to be transmitted, the drive force corresponding to the operation by the operation section; a second operation section connected to the bending section and provided along the longitudinal axis; a connection section capable of disconnectably connecting the first operation member and the second operation member; and a switching mechanism for switching, according to the relative movement between the longitudinal axis member and the insertion section, the first operation member and the second operation member between a connected state in which the first operation member and the second connection member are connected by the connection member and a disconnected state in which the first operation member and the second operation member are disconnected.Le système de dispositif médical ci-décrit comprend : un élément d'axe longitudinal qui a un axe longitudinal, un espace intérieur qui s'étend le long dudit axe longitudinal et s'inscrit dans ledit axe longitudinal ; une section insertion qui se trouve dans l'espace intérieur de manière à pouvoir être déplacée dans le sens dudit axe longitudinal et ayant une partie courbure pouvant être courbée ; une section actionnement pour actionner la partie courbure ; un premier élément d'actionnement relié à la section actionnement pour transmettre une force d'entraînement à la partie courbure, la force d'entraînement correspondant à l'actionnement par la section entraînement ; une seconde section actionnement reliée à la partie courbure et