A lens driving device, comprising: an auto-focusing driving part including: a first coil part to be disposed at a periphery of a lens holder that holds a lens part; a magnet part to be disposed to be spaced apart in a radial direction from the first coil part; and a first supporting member (13, 14) configured to support, with respect to an autofocus fixing part including the magnet part, an autofocus movable part including the first coil part such that the autofocus movable part is movable in an optical-axis direction, the auto-focusing driving part being configured to perform automatic focusing by utilizing a driving force of a voice coil motor composed of the first coil part and the magnet part; and a shake-correcting driving part including: the magnet part to be disposed in the auto-focusing driving part; a second coil part to be disposed to be spaced apart in the optical-axis direction from the magnet part; and a second supporting member configured to support, with respect to a shake-correcting fixing part including the second coil part, a shake-correcting movable part including the magnet part such that the shake-correcting movable part is allowed to sway in an optical-axis-orthogonal plane, the shake-correcting driving part being configured to perform shake correction by utilizing a driving force of an another voice coil motor composed of the second coil part and the magnet part, wherein the magnet part is substantially rectangular in plan view and includes first magnets (122A, 122C) to be disposed respectively at two opposite sides of four sides of the magnet part and a second magnet to be disposed at another side of the four sides, characterized in that: a side positioned opposite the second magnet is a no-magnet-disposing part in which no magnet is disposed, and a balance weight of a non-magnetic material is disposed in the no-magnet-disposing part. an auto-focusing driving part including: a first coil part to be disposed at a periphery of a lens holder that holds a lens part; a magnet part to be disposed to be spaced apart in a radial direction from the first coil part; and a first supporting member (13, 14) configured to support, with respect to an autofocus fixing part including the magnet part, an autofocus movable part including the first coil part such that the autofocus movable part is movable in an optical-axis direction, the auto-focusing driving part being configured to perform automatic focusing by utilizing a driving force of a voice coil motor composed of the first coil part and the magnet part; and a first coil part to be disposed at a periphery of a lens holder that holds a lens part; a magnet part to be disposed to be spaced apart in a radial direction from the first coil part; and a first supporting member (13, 14) configured to support, with respect to an autofocus fixing part including the magnet part, an autofocus movable part including the first coil part such that the autofocus movable part is movable in an optical-axis direction, the auto-focusing driving part being configured to perform automatic focusing by utilizing a driving force of a voice coil motor composed of the first coil part and the magnet part; and a shake-correcting driving part including: the magnet part to be disposed in the auto-focusing driving part; a second coil part to be disposed to be spaced apart in the optical-axis direction from the magnet part; and a second supporting member configured to support, with respect to a shake-correcting fixing part including the second coil part, a shake-correcting movable part including the magnet part such that the shake-correcting movable part is allowed to sway in an optical-axis-orthogonal plane, the shake-correcting driving part being configured to perform shake correction by utilizing a driving force of an another voice coil motor composed of the second coil part and the magnet part, wherein the magnet part to be disposed in the auto-focusing driving part; a second coil part to be disposed to be spaced apart in the optical-axis direction from the magnet part; and a second supporting member configured to support, with respect to a shake-correcting fixing part including the second coil part, a shake-correcting movable part including the magnet part such that the shake-correcting movable part is allowed to sway in an optical-axis-orthogonal plane, the shake-correcting driving part being configured to perform shake correction by utilizing a driving force of an another voice coil motor composed of the second coil part and the magnet part, wherein the magnet part is substantially rectangular in plan view and includes first magnets (122A, 122C) to be disposed respectively at two opposite sides of four sides of the magnet part and a second magnet to be disposed at another side of the four sides, characterized in that: a side positioned opposite the second magnet is a no-magnet-disposing part in which no magnet is disposed, and a balance weight of a non-magnetic material is disposed in the no-magnet-disposing part. a side positioned opposite the second magnet is a no-magnet-disposing part in which no magnet is disposed, and a balance weight of a non-magnetic material is disposed in the no-magnet-disposing part.