A liquid lens, comprising: a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed; a first electrode disposed under the first plate; a second electrode disposed on the first plate; a second plate (22, 22a, 22b, 22c, 22d) disposed on the second electrode; and a third plate disposed under the first electrode characterized in that wherein a region of the second plate (22, 22a, 22b, 22c, 22d), which is disposed on the conductive liquid, comprises: a first region, an entirety of the first region having a first thickness and encompassing an optical axis, and light being transmitted toward third plate through the first region, wherein the first region is not coupled to the first plate and an open region of the first plate overlaps the first region in a first direction parallel to the optical axis; a second region extending from the first region and being in contact with the conductive liquid, an entirety of the second region having a second thickness, wherein the second region is not coupled to the first plate; and a third region having a third thickness and coupled to the first plate, the second region being disposed between the first region and the third region, wherein the first thickness is larger than the second thickness. a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed; a first electrode disposed under the first plate; a second electrode disposed on the first plate; a second plate (22, 22a, 22b, 22c, 22d) disposed on the second electrode; and a third plate disposed under the first electrode characterized in that wherein a region of the second plate (22, 22a, 22b, 22c, 22d), which is disposed on the conductive liquid, comprises: a first region, an entirety of the first region having a first thickness and encompassing an optical axis, and light being transmitted toward third plate through the first region, wherein the first region is not coupled to the first plate and an open region of the first plate overlaps the first region in a first direction parallel to the optical axis; a second region extending from the first region and being in contact with the conductive liquid, an entirety of the second region having a second thickness, wherein the second region is not coupled to the first plate; and a third region having a third thickness and coupled to the first plate, the second region being disposed between the first region and the third region, wherein the first thickness is larger than the second thickness. a first region, an entirety of the first region having a first thickness and encompassing an optical axis, and light being transmitted toward third plate through the first region, wherein the first region is not coupled to the first plate and an open region of the first plate overlaps the first region in a first direction parallel to the optical axis; a second region extending from the first region and being in contact with the conductive liquid, an entirety of the second region having a second thickness, wherein the second region is not coupled to the first plate; and a third region having a third thickness and coupled to the first plate, the second region being disposed between the first region and the third region, wherein the first thickness is larger than the second thickness.