Device 5 for connecting a gas line 6 to a bag-in-container type of container 3, comprising a first 61 and a second part 62, movably connected to said first part 61, wherein one of the first or second part 61, 62 comprises a coupling opening 60 with coupling elements 67 for connecting the device 5 to a part of a bag-in-container type container 3 extending inside coupling opening 60. The connecting device 5 comprises a connecting element 70, movable between an extended position wherein the connecting element 70 extends partly inside coupling opening 60 and a retracted position in which the connecting element 70 extends less or not into coupling opening 60, the connecting device 5 further comprising a mechanism 72 for moving the connecting element 70 between the extended and the retracted position by relative movement of first and second parts 61, 62.