A light deflector includes a mirror unit having a light reflection plane, a base, a pair of elastic supporting members each having one end attached to the mirror unit and the other end attached to the base and configured to support the mirror unit in a rotatable and oscillatable manner, and a pair of drive bars each having one end attached to another end of a corresponding one of the elastic supporting members and the other end attached to the base in a cantilevered state. The mirror unit rotates and oscillates about a center of rotation as deformation of the drive bars is transmitted to the mirror unit through the elastic supporting members. The center of rotation of the mirror unit is within a range of −0.05×D to −0.01×D, where D denotes a diameter of the mirror unit.