Abstract: A fluid connection device (1), comprising a tubular shaft (2), the interior of which is divided by a partition (8) into two partial spaces (6,9) separated from each other. A respective side opening (11,12) opens into each of the two partial spaces. The side openings are covered by an elastomeric sleeve (3) so that the side openings are sealed shut as long as no other external forces act on the sleeve. By means of a union nut (4), which is intended to connect the tubular shaft to a container and is screwed onto the fitting thereof, the sleeve is compressed in the axial direction and produces an annular gap that extends across the side openings, by means of which the side openings are flow-connected from then on.