Brush holding assembly for an excited-rotor electric machine, comprising: - a casing provided with at least two ducts mutually flanked to each other and developing along a preferential direction between a first end and a second end; said second end being open and accessible; - at least two brushes housed and capable of sliding each in a respective duct and projecting externally to said second end; - a connecting member arranged to connect with an electric current generation unit associated with said casing at said first end of the ducts; - presser members associated with the brushes and configured to push said brushes in the direction of the second end in order to keep them pressed on the respective tracks of a rotating collector of a rotor; - at least two conductive elements developing along said preferential direction, each operatively interposed between a respective brush and said connecting member and configured to deform along said preferential direction in order to follow the movement of the brush imparted by the presser members, characterized in that said casing comprises fixing means externally faced to it and shaped to allow a reversible coupling of the casing with the housing of the collector, wherein said two conductive elements each have a conductive cartridge: - having an end constrained to said connecting member, - containing the respective brush and the respective presser member and - comprising at least one flexible element developing between a wall of said cartridge and the brush. - a casing provided with at least two ducts mutually flanked to each other and developing along a preferential direction between a first end and a second end; said second end being open and accessible; - at least two brushes housed and capable of sliding each in a respective duct and projecting externally to said second end; - a connecting member arranged to connect with an electric current generation unit associated with said casing at said first end of the ducts; - presser members associated with the brushes and configured to push said brushes in the direction of the second end in order to keep them pressed on the respective tracks of a rotating collector of a rotor; - at least two conductive elements developing along said preferential direction, each operatively interposed between a respective brush and said connecting member and configured to deform along said preferential direction in order to follow the movement of the brush imparted by the presser members, characterized in that said casing comprises fixing means externally faced to it and shaped to allow a reversible coupling of the casing with the housing of the collector, wherein said two conductive elements each have a conductive cartridge: - having an end constrained to said connecting member, - containing the respective brush and the respective presser member and - comprising at least one flexible element developing between a wall of said cartridge and the brush. - having an end constrained to said connecting member, - containing the respective brush and the respective presser member and - comprising at least one flexible element developing between a wall of said cartridge and the brush.