Disclosed is a fluid-connection device for connecting a first wall defining a first fluid space, for example a flexible 
pipe, to a second wall defining a second fluid space, in the form of a flexible 
pipe or 
enclosure, including a first male connector, the first connector including a seal and a snap-fitting collar, the seal extending radially prior to 
coupling from the axis until a first radial distance R1, a second female connector capable of receiving the first connector, the second connector including at least one flexible tab with one end against which the locking collar abuts in 
coupling position, in order to prevent retraction from the 
coupling position, the flexible tab being defined relative to the axis between a second radial distance R2 and a third radial distance R3, which is greater than the second radial distance R2, wherein R2>R1.