A downhole drilling device (1) may include a drill bit rotatable via a drill string (11); a guiding device (4) provided between said drill bit and said drill string (11), said guiding device (4) being connected to and operable independently from said drill string (11); and a power source (5) for powering said guiding device (4). The downhole drilling device (1) may include an inductive coupler (6, 6′) having a primary side (61) and a secondary side (63), said inductive coupler (6, 6′) being adapted to transfer power from said power source (5), connected to the primary side (61) of said inductive coupler (6, 6′), to said guiding device (4), connected to the secondary side (63) of said inductive coupler (6, 6′).