Fluidic connection device, in particular for a fluid circuit of a motor vehicle, comprising: - a female fluidic connector comprising a housing for inserting a male fluidic connector, by translation along an axis, - a generally U-shaped lock carried by said female connector and comprising a pair of elastically deformable legs, these legs being arranged substantially in a first plane, perpendicular to said axis and on either side of said axis and being intended to co-operate by elastic snap-fitting with said male connector so as to ensure a retaining of said male connector in said female connector along said axis, - a locking indicator carried by said female connector and capable of being moved in translation in a second plane, perpendicular to the axis, between a first position for releasing said lock and a second position for locking said lock, said indicator comprises at least one first pair of legs and a second pair of legs, the legs of the first pair being separated from the legs of the second pair and the legs of the first pair having an elastic deformation capacity by displacement from one another, which is different from the same capacity of the second pair, - said first pair of legs being intended to co-operate by elastic deformation with said male connector, from a first substantially free position without constraint, wherein these legs co-operate with said female connector to forbid a translation of the indicator in said second plane towards the axis, up to a constrained position, wherein said indicator is capable of being moved in translation in the second plane, - said second pair of legs being intended to co-operate by abutting with the legs of said lock to limit their displacement, when said indicator is in its second position, characterised in that the legs of the second pair are configured to each be sandwiched between one of the legs of said lock and a side wall (34c, 34d) of said female connector. - a female fluidic connector comprising a housing for inserting a male fluidic connector, by translation along an axis, - a generally U-shaped lock carried by said female connector and comprising a pair of elastically deformable legs, these legs being arranged substantially in a first plane, perpendicular to said axis and on either side of said axis and being intended to co-operate by elastic snap-fitting with said male connector so as to ensure a retaining of said male connector in said female connector along said axis, - a locking indicator carried by said female connector and capable of being moved in translation in a second plane, perpendicular to the axis, between a first position for releasing said lock and a second position for locking said lock, said indicator comprises at least one first pair of legs and a second pair of legs, the legs of the first pair being separated from the legs of the second pair and the legs of the first pair having an elastic deformation capacity by displacement from one another, which is different from the same capacity of the second pair, - said first pair of legs being intended to co-operate by elastic deformation with said male connector, from a first substantially free position without constraint, wherein these legs co-operate with said female connector to forbid a translation of the indicator in said second plane towards the axis, up to a constrained position, wherein said indicator is capable of being moved in translation in the second plane, - said second pair of legs being intended to co-operate by abutting with the legs of said lock to limit their displacement, when said indicator is in its second position, - said first pair of legs being intended to co-operate by elastic deformation with said male connector, from a first substantially free position without constraint, wherein these legs co-operate with said female connector to forbid a translation of the indicator in said second plane towards the axis, up to a constrained position, wherein said indicator is capable of being moved in translation in the second plane, - said second pair of legs being intended to co-operate by abutting with the legs of said lock to limit their displacement, when said indicator is in its second position, characterised in that the legs of the second pair are configured to each be sandwiched between one of the legs of said lock and a side wall (34c, 34d) of said female connector.