To provide a lens driving device not only preventing a photographic video from being vibrated by vibration by a driving motor but also faithfully transmitting feed displacement by the driving motor as the feed displacement of a lens and having stable driving performance.

This device is equipped with a positioning dowel 2b turnably pivotally supporting a driving member 9 in a lens holding frame 2 without backlash, a rack part 9f and a coil spring attaching dowel 9h formed on the member 9, and a coil spring 11 attached to the dowel 9h, pressing the rack part 9f to the feed screw 7a of the driving motor 6 with the dowel 2b as a turning fulcrum and having elastic turning force in a direction where the frame 2 abuts on a 2nd guide pole 4, and then moment in the direction where the frame 2 is made to press-contact with the pole 4 by the gravity of the frame 2 including the lens 1 is added to the elastic turning force.