A lens array capable of making the characteristics of lens elements uniform is provided. A lens array 10 according to the present invention includes first liquid 11 that is conductive, second liquid 12 that is insulative and that has a refractive index different from that of the first liquid, and a plurality of lens elements 13 forming lens surfaces 13A at an interface between the first liquid 11 and the second liquid 12. The lens surfaces 13A of the lens elements 13 reversibly vary in accordance with output control of an applied voltage. The lens array is structured such that the adjacent lens elements 13 liquidly communicate with each other, whereby differences in the amounts of the first liquid 11 and the second liquid 12 between the lens elements can be avoided and the lens characteristics can be made uniform.