Abstract: The invention provides a device for assembling a urgical needle (700) and a suture thread (110, 115), the device comprising an extractor device (300, 400, 500) for extracting one segment of suture thread (110, 115) from a bundle (100) of segments (110, 115) the extractor device (300, 400, 500) comprising means (322, 324, 400) suitable for displacing segments (110, 115) by air flowing transversely to the longitudinal direction of the bundle, a suction inlet (322, 324) suitable for being placed laterally relative to the bundle (100), and two sliding surfaces (310) suitable for guiding one segment (110, 115) to the suction orifice (322, 324) when the segments (110, 115) are displaced by the flow of air.