Connection arrangement having a first and second connection body for forming a pneumatic connection along a connection axis and having a sealing element for sealing a sealing gap which surrounds the pneumatic connection and which has a longitudinal dimension which extends parallel to the connection axis , wherein a pneumatic flow is able to travel through the first and second connection bodies along the connection axis , and the second connection body has a through-hole having a cross section (9.1) transversely to the connection axis , wherein - the first connection body is arranged at least partially in the through-hole ; - an at least partially circumferential first recess transversely to the connection axis is formed on an outer face of the first connection body extending parallel to the connection axis for receiving the sealing element ; - an at least partially circumferential second recess transversely to the connection axis is formed on an inner face of the second connection body extending parallel to the connection axis for receiving the sealing element , wherein the first and second recesses at least partially oppose one another; characterized in that - a first longitudinal dimension (6.3) parallel to the connection axis of the first recess and a second longitudinal dimension (7.3) parallel to the connection axis of the second recess have substantially the same length and the sum of the depth of a first depth dimension (6.2) of the first recess transversely to the connection axis of the first recess and the depth of a second depth dimension (7.2) of the second recess transversely to the connection axis of the second recess have substantially the same linear measurement as the first and second longitudinal dimensions (6.3, 7.3); and - the sealing element is arranged in at least one portion (8.1) of a circumferential chamber for the latching connection of the first and second connection bodies , wherein the circumferential chamber is formed by the first and second recesses . - the first connection body is arranged at least partially in the through-hole ; - an at least partially circumferential first recess transversely to the connection axis is formed on an outer face of the first connection body extending parallel to the connection axis for receiving the sealing element ; - an at least partially circumferential second recess transversely to the connection axis is formed on an inner face of the second connection body extending parallel to the connection axis for receiving the sealing element , wherein the first and second recesses at least partially oppose one another; characterized in that - a first longitudinal dimension (6.3) parallel to the connection axis of the first recess and a second longitudinal dimension (7.3) parallel to the connection axis of the second recess have substantially the same length and the sum of the depth of a first depth dimension (6.2) of the first recess transversely to the connection axis of the first recess and the depth of a second depth dimension (7.2) of the second recess transversely to the connection axis of the second recess have substantially the same linear measurement as the first and second longitudinal dimensions (6.3, 7.3); and - the sealing element is arranged in at least one portion (8.1) of a circumferential chamber for the latching connection of the first and second connection bodies , wherein the circumferential chamber is formed by the first and second recesses . <EOS>