Elevator car for a double-deck elevator , wherein the elevator car has two cabins (200; 402) arranged one above the other in the operational state, wherein the cabins (200; 402) are each accessible via a different floor in a stop position of the elevator car , wherein the elevator car has: an elevator car frame having at least one longitudinal support extending in the longitudinal direction of the elevator car frame ; a first support structure arranged in the elevator car frame for supporting a first of the cabins; a second support structure arranged in the elevator car frame for supporting a second of the cabins; a linear guide means which is designed to movably couple at least the first support structure to the longitudinal support so that the first support structure can be moved along the longitudinal support relative to the second support structure ; wherein the linear guide means has: at least one rail element which is fastened to the longitudinal support , and at least one coupling element which, on the one hand, is slidably mounted on the rail element and, on the other hand, is fastened to the first support structure ; wherein the coupling element has: a first mounting portion and a second mounting portion for mounting the coupling element on the rail element , and a fastening portion arranged between the first mounting portion and the second mounting portion for fastening the coupling element to the first support structure , wherein, in the operational state of the elevator car , the first mounting portion is arranged above the first support structure and/or the second mounting portion is arranged below the first support structure ; and a drive means which is designed to move at least the first support structure relative to the second support structure . an elevator car frame having at least one longitudinal support extending in the longitudinal direction of the elevator car frame ; a first support structure arranged in the elevator car frame for supporting a first of the cabins; a second support structure arranged in the elevator car frame for supporting a second of the cabins; a linear guide means which is designed to movably couple at least the first support structure to the longitudinal support so that the first support structure can be moved along the longitudinal support relative to the second support structure ; wherein the linear guide means has: at least one rail element which is fastened to the longitudinal support , and at least one coupling element which, on the one hand, is slidably mounted on the rail element and, on the other hand, is fastened to the first support structure ; wherein the coupling element has: a first mounting portion and a second mounting portion for mounting the coupling element on the rail element , and a fastening portion arranged between the first mounting portion and the second mounting portion for fastening the coupling element to the first support structure , wherein, in the operational state of the elevator car , the first mounting portion is arranged above the first support structure and/or the second mounting portion is arranged below the first support structure ; and a drive means which is designed to move at least the first support structure relative to the second support structure . <EOS>