Interior construction device for a habitation vehicle, with at least one movable door unit, which is movable from at least one first door position into at least one second door position, with at least one functional unit, which can be operated electrically and electronically and which is arranged at the door unit, and with at least one supply unit, which is configured to supply the functional unit with an electric signal and an electronic signal at least depending on a door position (16, 18) of the door unit, the electric signal being configured for an energy supply of the functional unit and the electronic signal being configured for a data supply of the functional unit, the supply unit being configured for a connection that is free of loose and/or visible cables, the supply unit being configured to supply the functional unit in the first door position and in the second door position with the electric signal and the electronic signal, the supply unit comprising at least one control unit which provides the electronic signal, the supply unit comprising at least one energy supply which provides the electric signal, the supply unit comprising at least one contact unit which is configured, for an electronic and electric supply of the functional unit, to be contacted at least depending on a door position (16, 18) and which is realized separately from the door unit and/or from the functional unit, characterised in that the contact unit comprises at least two contact elements (118, 119) for the supply with an electric signal, wherein the contact unit comprises at least two further contact elements (130, 131) for the supply with an electronic signal, wherein the supply unit comprises at least one further contact unit which is arranged offset with respect to the contact unit, the further contact unit being realized at least substantially identically to the contact unit, wherein the supply unit comprises at least one corresponding contact unit, the corresponding contact unit being realized correspondingly to the contact unit and to the further contact unit and being arranged on the door unit and/or on the functional unit and/or being integrated therein, the corresponding contact unit being configured for contacting either the contact unit or the further contact unit depending on the position of the door unit in order to supply the functional unit with the electric signal and with the electronic signal. with at least one movable door unit, which is movable from at least one first door position into at least one second door position, with at least one functional unit, which can be operated electrically and electronically and which is arranged at the door unit, and with at least one supply unit, which is configured to supply the functional unit with an electric signal and an electronic signal at least depending on a door position (16, 18) of the door unit, the electric signal being configured for an energy supply of the functional unit and the electronic signal being configured for a data supply of the functional unit, the supply unit being configured for a connection that is free of loose and/or visible cables, the supply unit being configured to supply the functional unit in the first door position and in the second door position with the electric signal and the electronic signal, the supply unit comprising at least one control unit which provides the electronic signal, the supply unit comprising at least one energy supply which provides the electric signal, the supply unit comprising at least one contact unit which is configured, for an electronic and electric supply of the functional unit, to be contacted at least depending on a door position (16, 18) and which is realized separately from the door unit and/or from the functional unit, characterised in that the contact unit comprises at least two contact elements (118, 119) for the supply with an electric signal, wherein the contact unit comprises at least two further contact elements (130, 131) for the supply with an electronic signal, wherein the supply unit comprises at least one further contact unit which is arranged offset with respect to the contact unit, the further contact unit being realized at least substantially identically to the contact unit, wherein the supply unit comprises at least one corresponding contact unit, the corresponding contact unit being realized correspondingly to the contact unit and to the further contact unit and being arranged on the door unit and/or on the functional unit and/or being integrated therein, the corresponding contact unit being configured for contacting either the contact unit or the further contact unit depending on the position of the door unit in order to supply the functional unit with the electric signal and with the electronic signal.