Compact and demountable fluid connection device

A connection device for connecting a tubular connector defining a longitudinal direction and provided with an annular collar to an item of equipment comprising a passage, the connection device comprising:

• a connection end fitting connecting to the passage of the equipment, the connection end fitting having a tubular body and a head provided with an opening leading into the tubular body and comprising an elliptical annular groove;
• and
• a locking ring including at least two flexible longitudinal legs intended to be inserted into the connection end fitting and each having an elliptical-shaped cross section, an inner surface, an outer surface, and a free end, the outer surface carrying at least one lug intended to clip into the annular groove to keep the locking ring integral with the connection end fitting, the two flexible legs capable of deforming and closing on the tubular connector when the male connector is introduced longitudinally into the locking ring.