Device for embedding a thread in a rubber profiled element comprising: a continuous thread feeder arranged on a structure, a moving support able to run along the structure between a raised and a lowered position. A hollow needle, comprising a canal in which the thread runs is fixed by one of its ends to the base of the moving support in the duct, and a tip at its other end capable of penetrating the rubber profiled element, a cutter arranged on the structure, comprising a rotary blade able to cut off the thread at a given distance from the tip of the needle upon each cycle of reciprocating movement of the needle. The cutter comprises a paddle arranged behind the cutting wire of the blade and intended to fold the tail around the tip of the needle just after the thread has been cut by the blade.