Support element and method for a cryogenic fluid circuit comprising a plurality of orifices intended for the passage of cryogenic-fluid transfer pipes, said support element comprising at least one thermal path formed between two adjacent orifices, the thermal path comprising a blind opening, the opening being delimited by two spaced-apart walls extending between two ends in a longitudinal direction perpendicular to the plane of the orifices, the two walls being joined together by an end wall, the support element being characterized in that it comprises a first set of orifices which is surrounded by a first thermal path and a second set of orifices, the first thermal path being situated between the first set of orifices and the second set of orifices, which means to say that the first thermal path is in thermal and mechanical connection with, on the one hand, all the orifices of the first set of orifices and, on the other hand, all the orifices of the second set of orifice.