A pillow (1) characterized in that it comprises: - a padding (2); - a sheath (3) for covering said padding (2) on which the user rests his/her head and/or neck when the pillow is in use; - wherein said covering sheath (3) is made of a substantially woven material comprising a system of metal conductors (4); and - wherein said system of metal conductors (4) extends substantially over the entire surface of said covering sheath and it is supplied with an electrical signal such as to have electromagnetic waves for electromagnetic therapy be transmitted to said system of metal conductors, and, in use, the waves flow into said head and/or said neck of said subject.