A lens module in an embodiment includes a first plate having therein a first cavity; a second plate overlapping the first plate in a vertical direction, the second plate having therein a second cavity; a first liquid disposed in the first cavity; and a second liquid disposed in the second cavity, wherein a cross-section obtained by cutting the first cavity in a horizontal direction perpendicular to the vertical direction has a polygonal shape, and wherein a cross-section obtained by cutting the second cavity in the horizontal direction has a circular shape.