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 (A) 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 (A), each operatively interposed between a respective brush and said connecting member and configured to deform along said preferential direction (A) 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 (A) 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 (A), each operatively interposed between a respective brush and said connecting member and configured to deform along said preferential direction (A) 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 . <EOS>