A horizontal sliding wall system, comprising a ceiling guide with at least one running rail, as well as at least one door leaf element, which is connected to a roller carriage, which is disposed in the ceiling guide to be displaceable, wherein • at least one door leaf element is configured as a swing sliding leaf to be pivotable and displaceable in the ceiling guide, • wherein the swing sliding leaf comprises a swing leaf door, as well as • an interlocking handle, which is rotatably embodied between a first interlocking location and a second interlocking location, and • a first gear arrangement, and • a second gear arrangement, wherein the first gear arrangement transforms the rotary movement of the interlocking handle into a vertical translatory movement of a first interlocking rod and of a second interlocking rod, wherein the second gear arrangement is coupled to at least one of the interlocking rods (801, 802), such that the vertical translatory movement of one of the interlocking rods (801, 802) is transformed into a horizontal movement of a third interlocking rod, the second interlocking rod at the ceiling sided distal end thereof includes an interlocking bolt, which in the first interlocking location of the interlocking handle engages into a stationary rotary bearing, and the first interlocking rod at the floor-sided end thereof includes an interlocking bolt, which in the first interlocking location of the interlocking handle engages into a floor-sided stationary rotary bearing such that a rotary movement of the swing sliding leaf around the interlocking rods (801, 802) may be effected, and a displacement of the door leaf element is prevented, wherein in the second interlocking location, the interlocking handle prevents a rotary movement of the swing sliding leaf around the interlocking rods (801, 802) and allows for a displacement of the door leaf element, wherein the third interlocking rod includes a coupling means, which in the second interlocking location of the interlocking handle is in engagement with a corresponding coupling means of the swing leaf door, such that a rotary movement of the swing sliding leaf around the interlocking rods (801, 802) is prevented, however a displacement of the door leaf element is enabled, characterized in that the second gear arrangement comprises at least one first lever and a second lever, wherein the first lever is articulately supported at the second interlocking rod and is articulately supported at the second lever, wherein the second lever is displaceably accommodated in the horizontal door leaf frame of the door leaf, wherein the second lever is coupled to the third interlocking rod, wherein the third interlocking rod is displaceably guided in the horizontal door leaf frame, wherein the third interlocking rod is coupled to at least one preferably two sliding elements (823, 824), which are displaceably accommodated in the horizontal door leaf frame of the door leaf, and wherein the at least one sliding element (823, 824) has a thermal conductivity of 0,1 to 2 W m-1 K-1, preferably of 0,1 to 1,5 W m-1 K-1, in particular preferred of 0,1 to 1 W m-1 K-1, and a thermal linear expansion coefficient of 0,1 - 2, preferably of 0,5 - 1,5, in particular preferred of 0,1 to 1,0 * 10-6 K-1. • at least one door leaf element is configured as a swing sliding leaf to be pivotable and displaceable in the ceiling guide, • wherein the swing sliding leaf comprises a swing leaf door, as well as • an interlocking handle, which is rotatably embodied between a first interlocking location and a second interlocking location, and • a first gear arrangement, and • a second gear arrangement,