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.