Connection device for connecting a conductor, in particular a screen conductor, of a cable to a support rail for their electrical connection to each other, having a connecting element which, to be arranged on the support rail, has latching means, by means of which the connecting element latches on the support rail and, in the latching position, is held on at least a first free and and also on a second free end, opposite to the first free end, of the support rail, and, in the process, connects the conductor of the cable arranged on the connecting element electrically to the support rail, wherein the connecting element has a receiving space, which is configured and designed in such a way that, in the latching position, at least one uninsulated conductor section of the conductor that is received in the receiving space is arranged between the connecting element and the support rail, wherein the connecting element has contacting means, which are configured and designed in such a way that when the connecting element is latched onto the support rail, the contacting means apply a spring force to the uninsulated conductor section of the conductor that is arranged in the receiving space and therefore press the conductor against the connecting element and/or the support rail, characterized in that the latching means have at least two latching hooks (50, 52, 54, 56) which are spaced apart from each other and moulded in one piece on the connecting element and which are configured, designed and arranged on the connecting element in such a way that a first latching hook (50, 54) interacts with the first free end of the support rail and a second latching hook (52, 56) interacts with the second free end of the support rail to latch the connecting element onto the support rail, and in that the contacting means have at least one contact spring tongue, which is electrically conductively connected to the connecting element and is designed and arranged on the latter in such a way that, in the latching position of the connecting element, the contact spring tongue contacts the uninsulated conductor section under spring force, wherein the connecting element is formed in one piece and wherein the contact spring tongue is moulded in one piece on the connecting element. having a connecting element which, to be arranged on the support rail, has latching means, by means of which the connecting element latches on the support rail and, in the latching position, is held on at least a first free and and also on a second free end, opposite to the first free end, of the support rail, and, in the process, connects the conductor of the cable arranged on the connecting element electrically to the support rail, wherein the connecting element has a receiving space, which is configured and designed in such a way that, in the latching position, at least one uninsulated conductor section of the conductor that is received in the receiving space is arranged between the connecting element and the support rail, wherein the connecting element has contacting means, which are configured and designed in such a way that when the connecting element is latched onto the support rail, the contacting means apply a spring force to the uninsulated conductor section of the conductor that is arranged in the receiving space and therefore press the conductor against the connecting element and/or the support rail, characterized in that the latching means have at least two latching hooks (50, 52, 54, 56) which are spaced apart from each other and moulded in one piece on the connecting element and which are configured, designed and arranged on the connecting element in such a way that a first latching hook (50, 54) interacts with the first free end of the support rail and a second latching hook (52, 56) interacts with the second free end of the support rail to latch the connecting element onto the support rail, and in that the contacting means have at least one contact spring tongue, which is electrically conductively connected to the connecting element and is designed and arranged on the latter in such a way that, in the latching position of the connecting element, the contact spring tongue contacts the uninsulated conductor section under spring force, wherein the connecting element is formed in one piece and wherein the contact spring tongue is moulded in one piece on the connecting element.