Supply system for elongate elements (100, 100', 100") for supplying elongate elements (100, 100', 100") in an advance direction comprising: - a containment device for containing a plurality of elongate elements (100, 100', 100") which are stacked one on the other so as to form a pile of elongate elements (100, 100', 100"), - said elongate elements (100, 100', 100") being planar elements with a prevalent longitudinal extent along a longitudinal axis of said elongate elements (100, 100', 100"), - a conveying device for conveying said elongate elements (100, 100', 100") to an operating machine, said conveying device being provided with a movement device which is capable of moving said elongate elements (100, 100', 100") along said advance direction, - an extraction device for extracting said elongate elements (100, 100', 100") from said containment device and for moving said elongate elements (100, 100', 100") towards said conveying device, - said extraction device comprising at least one extraction element (31, 31A) which is formed to engage with the lower elongate element which is positioned in a lower position in said pile and to extract it from said pile by moving it in an extraction direction which is located substantially perpendicularly to said advance direction towards the conveying device, said at least one extraction element comprising an engagement tooth which is provided on the face of the extraction element which is directed towards the lower elongate element and which projects from said face in order to engage with said lower elongate element in order to extract it from said pile, characterised in that said at least one extraction element comprises a pair of engagement teeth which are arranged in the region of opposite edges of said extraction element so as to define a C-shaped extraction element. - a containment device for containing a plurality of elongate elements (100, 100', 100") which are stacked one on the other so as to form a pile of elongate elements (100, 100', 100"), - said elongate elements (100, 100', 100") being planar elements with a prevalent longitudinal extent along a longitudinal axis of said elongate elements (100, 100', 100"), - a conveying device for conveying said elongate elements (100, 100', 100") to an operating machine, said conveying device being provided with a movement device which is capable of moving said elongate elements (100, 100', 100") along said advance direction, - an extraction device for extracting said elongate elements (100, 100', 100") from said containment device and for moving said elongate elements (100, 100', 100") towards said conveying device, - said extraction device comprising at least one extraction element (31, 31A) which is formed to engage with the lower elongate element which is positioned in a lower position in said pile and to extract it from said pile by moving it in an extraction direction which is located substantially perpendicularly to said advance direction towards the conveying device, said at least one extraction element comprising an engagement tooth which is provided on the face of the extraction element which is directed towards the lower elongate element and which projects from said face in order to engage with said lower elongate element in order to extract it from said pile, characterised in that said at least one extraction element comprises a pair of engagement teeth which are arranged in the region of opposite edges of said extraction element so as to define a C-shaped extraction element.