Lens drive device and camera module

A lens drive device, comprising:

• a support;
• a lens holder that includes a cylinder configured to arrange a lens body in the cylinder, and that is movable with respect to the support in a direction of an optical axis;
• and
• a plurality of shape memory alloy wires that are provided between the support and the lens holder, and that are configured to move the lens holder in the direction of the optical axis, wherein
• the support includes a guide and a first magnetic member, the guide being configured to guide the lens holder to move in the direction of the optical axis,
• the lens holder includes a guided part and a second magnetic member, the guided part being configured to slide with the guide and be guided by the guide, and the second magnetic member being arranged at a position apart from the first magnetic member in a direction crossing the direction of the optical axis, and
• at least one of the first magnetic member or the second magnetic member is formed of a magnet,
• a magnetic force is generated between the first magnetic member and the second magnetic member,
• the magnetic force exerts a force to push the guide and the guided part against each other in the direction crossing the direction of the optical axis, and
• the guide and the guided part are arranged to be in a contacted state regardless of a position of the lens holder in the direction of the optical axis.