An optical element driving unit , comprising: a stationary body ; a carrier , configured for at least one optical element to be disposed thereon, wherein the carrier has at least one degree of freedom of movement relative to the stationary body ; a supporting mechanism , connected to the carrier and the stationary body , wherein the supporting mechanism provides the carrier with the at least one degree of freedom of movement relative to the stationary body ; and an electromagnetic driving assembly , configured to move the carrier relative to the stationary body , wherein the electromagnetic driving assembly comprises: a driving coil , disposed on the carrier ; a driving magnet , disposed on the stationary body and disposed corresponding to the driving coil ; and a ferromagnetic element , embedded in the carrier ; wherein the optical element driving unit is characterized in that the ferromagnetic element has the at least one degree of freedom of movement relative to the stationary body , the ferromagnetic element is one-piece formed and comprises a magnetic field guiding part and a first electrical connection part , the magnetic field guiding part faces at least one of the driving coil and the driving magnet , the first electrical connection part is exposed on a surface of the carrier , and the first electrical connection part is electrically connected to the driving coil . a stationary body ; a carrier , configured for at least one optical element to be disposed thereon, wherein the carrier has at least one degree of freedom of movement relative to the stationary body ; a supporting mechanism , connected to the carrier and the stationary body , wherein the supporting mechanism provides the carrier with the at least one degree of freedom of movement relative to the stationary body ; and an electromagnetic driving assembly , configured to move the carrier relative to the stationary body , wherein the electromagnetic driving assembly comprises: a driving coil , disposed on the carrier ; a driving magnet , disposed on the stationary body and disposed corresponding to the driving coil ; and a ferromagnetic element , embedded in the carrier ; wherein the optical element driving unit is characterized in that the ferromagnetic element has the at least one degree of freedom of movement relative to the stationary body , the ferromagnetic element is one-piece formed and comprises a magnetic field guiding part and a first electrical connection part , the magnetic field guiding part faces at least one of the driving coil and the driving magnet , the first electrical connection part is exposed on a surface of the carrier , and the first electrical connection part is electrically connected to the driving coil . a driving coil , disposed on the carrier ; a driving magnet , disposed on the stationary body and disposed corresponding to the driving coil ; and a ferromagnetic element , embedded in the carrier ; wherein the optical element driving unit is characterized in that the ferromagnetic element has the at least one degree of freedom of movement relative to the stationary body , the ferromagnetic element is one-piece formed and comprises a magnetic field guiding part and a first electrical connection part , the magnetic field guiding part faces at least one of the driving coil and the driving magnet , the first electrical connection part is exposed on a surface of the carrier , and the first electrical connection part is electrically connected to the driving coil . <EOS>