A take-off needle comprises a hollow lance having a distal end adapted to perform a insertion operation, said hollow lance being connected to at least one pipe provided with a spigot for it to be connected to a tube, and comprising a body for holding the hollow lance and pipe relative to each other such that the spigot projects from the holding body, said needle further comprising two flanges held on respective sides of and spaced from the holding body by virtue of a spacer disposed between each flange and the holding body, said flanges extending in a longitudinal direction from the spigot to the vicinity of the proximal end of the hollow lance, the width of each flange being greater than the width of the portion of the holding body facing the flanges.