tight seal of conduits 102 202 thus corresponding conduits 102 202 are effectively protected from contamination due for example to coughing and from exposure to unwanted liquid or solid particles as fig1 shows the ends of outer socket connectors 116 216 project slightly above and beyond inner socket connectors 106 206 this makes it possible to achieve an opening of membranes 112 212 with the movement of sealing parts 110 210 before they come in contact with conduits 102 202 or with inner socket connectors 106 206 this ensures that a sterile connection is possible even in the event pathogens or other particles are present on the inside of membranes 112 212 because a contacting of membranes 112 212 with conduits 102 202 and especially with the end areas of inner socket connectors 106 206 is effectively prevented according to the present invention a penetration body 30 is arranged in socket connector 106 of connector element 10 and is held in a suitable position in socket connector 106 by a second lock 40 disposed in the middle portion of the penetration body 30 penetration body 30 also has a projection 302 extending from its outside circumference 0038 fig2 shows the next step as the connection between connector elements 10 20 is made connector elements 10 20 according to the present invention are in a position where housing 208 of connector element 20 and sealing part 110 are facing each other and are in contact in their end areas up.