A device for guiding a long object is provided with a plurality of links. Each of the links has a pair of link parts that face each other along a first direction. The links are linked together while being arranged in series along a second direction. Each pair of link parts is linked together in the outer end and inner end of the link by a first arm and a second arm for each pair. A space enclosed by each pair of link parts, the first arms, and the second arms and formed so as to extend in the second direction constitutes an accommodating space for accommodating a long object. Each pair of link parts is provided with an elastically deformable linking part for linking a first link-forming part and a second link-forming part. The linking part has a curved section.