A liquid lens includes a first plate including a cavity in which a conductive liquid and a non-conductive liquid are disposed; a first electrode placed under the first plate; a second electrode placed on the first plate; a second plate on the second electrode; and a third plate under the first electrode, wherein a region of the second plate, which is disposed on the conductive liquid, includes a first region having a first thickness and including an optical axis, and a second region extending from the first region and having a second thickness, and the first thickness is greater than the second thickness.