A lens driving device has first and second driving units for moving first
and second lens holders supporting first and second sets of lens elements
in an optical axis direction, respectively. The first and second driving
units each have a motor, a gear fitted around an output shaft of the
motor, a lead screw rotated by the gear, and a nut fitted around the lead
screw. The output shafts of the first and second motors overlap each
other in their axial direction. The first and second driving units move
the first and second lens holders in the optical axis direction via the
respective nuts moving in the optical axis direction. An image pickup
plane side end face of the motor of the first driving unit is positioned
more to the image pickup plane side than a position most to the subject
side of the second lens holder is.