A motor-operated tilt steering device including a fixed bracket fixed to the body of a vehicle and supporting a lower steering shaft by means of a lower column, a tilt bracket pivotally movably attached to the fixed bracket and supporting by an upper column an upper steering shaft connected to the lower steering shaft by a universal joint, a tilting electric motor attached to the fixed bracket, and an arrangement for converting the rotation of the motor to a pivotal movement of the tilt bracket. The conversion arrangement includes a screw shaft attached to the fixed bracket in parallel with the motor, a timing belt coupling the motor to the screw shaft, a screw nut in meshing engagement with the screw shaft, and an eccentric member coupling the screw nut to the tilt bracket.