A guide device for a line, in particular for an energy guide chain, which is displaceable in such a way that a first run thereof can be positioned over a second run thereof and the two runs are connected together by an arcuate portion, wherein the guide device has laterally mutually opposite guide walls (2, 3) for guiding the first and/or the second run, that at least in a region comprise laterally mutually opposite wall elements (4, 5) which are formed in one piece from plastic and which respectively have two ends (6, 7) facing away from each other in the longitudinal direction of the wall element (4, 5), defined by the longitudinal direction of the guide device, an outside which faces away from the laterally mutually opposite wall element (4, 5), an inside which faces towards the laterally mutually opposite wall element (4, 5) and has a guide region for the line, and a top side and underside narrower with respect to the outside and the inside (8, 9), at least two directly adjacent wall elements (4, 5) which at their mutually facing front end regions have integrally formed fixing means which without the interposition of a further fixing means or with the interposition of a further fixing means for fixing the two directly adjacent wall elements (4, 5) to each other cooperate with each other, wherein for connecting the fixing means integrally formed on the mutually facing front end regions of the wall elements (4, 5) without the interposition of a further fixing means, one of the fixing means has a projection and another of the fixing means has a recess or opening, wherein said projection engages into said recess or opening and the width of the recess or opening in the longitudinal direction of the wall elements (4, 5) is greater than width of the projection so that a movement of the two directly adjacent wall elements (4, 5) relative to each other in their longitudinal direction can take place over a predetermined limited distance, or wherein the fixing means integrally formed on their mutually facing front end regions are connected to each other in a positively locking relationship with the interposition of a further fixing means via an intermediate member as a further fixing means, the directly adjacent wall elements (4, 5) each have a bar at their mutually facing front end regions in the region of their undersides, at the front end of said bar facing the directly adjacent wall element (4, 5) a projection is arranged and a recess extends around the projection at its side facing towards the inside and away from the end of the wall element (4, 5), into which an engagement region of the intermediate member engages, and the projections of the directly adjacent wall elements (4, 5) engage into a recess provided at the underside of the intermediate member or into a through opening extending from the underside of the intermediate member up to its top, wherein the width of the recess or through opening in the longitudinal direction of the wall elements (4, 5) is larger dimensioned than the width occupied by the two projections when the front ends of the directly adjacent wall elements (4, 5) bear against each other, so that a movement of the two wall elements (4, 5) relative to each other in their longitudinal direction can take place over a predetermined limited distance. wherein for connecting the fixing means integrally formed on the mutually facing front end regions of the wall elements (4, 5) without the interposition of a further fixing means, one of the fixing means has a projection and another of the fixing means has a recess or opening, wherein said projection engages into said recess or opening and the width of the recess or opening in the longitudinal direction of the wall elements (4, 5) is greater than width of the projection so that a movement of the two directly adjacent wall elements (4, 5) relative to each other in their longitudinal direction can take place over a predetermined limited distance, or wherein the fixing means integrally formed on their mutually facing front end regions are connected to each other in a positively locking relationship with the interposition of a further fixing means via an intermediate member as a further fixing means, the directly adjacent wall elements (4, 5) each have a bar at their mutually facing front end regions in the region of their undersides, at the front end of said bar facing the directly adjacent wall element (4, 5) a projection is arranged and a recess extends around the projection at its side facing towards the inside and away from the end of the wall element (4, 5), into which an engagement region of the intermediate member engages, and the projections of the directly adjacent wall elements (4, 5) engage into a recess provided at the underside of the intermediate member or into a through opening extending from the underside of the intermediate member up to its top, wherein the width of the recess or through opening in the longitudinal direction of the wall elements (4, 5) is larger dimensioned than the width occupied by the two projections when the front ends of the directly adjacent wall elements (4, 5) bear against each other, so that a movement of the two wall elements (4, 5) relative to each other in their longitudinal direction can take place over a predetermined limited distance.