Wrapping head for loads, particularly for palletized loads, comprising: at least one support framework for at least one reel of extensible material, said support framework comprising at least one pair of plates (2a, 2b) connected to each other by means of a longitudinal plate extending along a longitudinal axis (x-x) of the framework, said reel being supportable by said support framework parallel to said axis (x-x) and said extensible material being, in use, unwindable from said at least one reel along a delivery plane, with a face facing said palletized load and a face facing said support framework between a first and a second edge (5c, 5d); at least return means for said extensible material, which return means are supported by said at least one support frame along said longitudinal axis (x-x); at least one folding group for said extensible material, downstream of said return means, said folding group being designed, in use, for engaging and folding at least one peripheral portion (p) of said extensible material on itself, thereby obtaining a double layer band of said extensible material, wherein said at least one folding group is supported by said support framework at said longitudinal plate, and comprises guide means for said extensible material, designed to keep in position said extensible material exiting said return means, thereby avoiding, during folding, undesired adhesions between the portions of extensible material approaching each other, characterized in that said at least one folding group comprises: at least some tiltable means design to tilt between a first working position and a second working position, around an axis (y-y) which is substantially orthogonal to said axis (x-x) of said framework and parallel to said delivery plane; actuating means for said tiltable means; said guide means including at least one curving means, connected to said support framework at the articulation of said tiltable means, said at least one curving means being arranged along said axis (y-y); said curving means including a rounded element at the lower part, for example a folded lamina, made of any suitable anti-stick material, having a section with concavity facing towards the upper plate of the wrapping head, with radius of curvature such to allow the sliding of the extensible material exiting from the return means and, at the same time, capable of accompanying the material during the folding step thus avoiding the occurrence of unwanted sticking. at least one support framework for at least one reel of extensible material, said support framework comprising at least one pair of plates (2a, 2b) connected to each other by means of a longitudinal plate extending along a longitudinal axis (x-x) of the framework, said reel being supportable by said support framework parallel to said axis (x-x) and said extensible material being, in use, unwindable from said at least one reel along a delivery plane, with a face facing said palletized load and a face facing said support framework between a first and a second edge (5c, 5d); at least return means for said extensible material, which return means are supported by said at least one support frame along said longitudinal axis (x-x); at least one folding group for said extensible material, downstream of said return means, said folding group being designed, in use, for engaging and folding at least one peripheral portion (p) of said extensible material on itself, thereby obtaining a double layer band of said extensible material, wherein said at least one folding group is supported by said support framework at said longitudinal plate, and comprises guide means for said extensible material, designed to keep in position said extensible material exiting said return means, thereby avoiding, during folding, undesired adhesions between the portions of extensible material approaching each other, at least some tiltable means design to tilt between a first working position and a second working position, around an axis (y-y) which is substantially orthogonal to said axis (x-x) of said framework and parallel to said delivery plane; actuating means for said tiltable means; said guide means including at least one curving means, connected to said support framework at the articulation of said tiltable means, said at least one curving means being arranged along said axis (y-y); said curving means including a rounded element at the lower part, for example a folded lamina, made of any suitable anti-stick material, having a section with concavity facing towards the upper plate of the wrapping head, with radius of curvature such to allow the sliding of the extensible material exiting from the return means and, at the same time, capable of accompanying the material during the folding step thus avoiding the occurrence of unwanted sticking.