A camera module (100A, 100B), comprising: a liquid lens unit (140A, 140B), the liquid lens unit (140A, 140B) including a first connection substrate (141A, 141B); a lens holder in which the liquid lens unit (140A, 140B) is disposed; a main board configured to supply a driving signal to drive the liquid lens unit (140A, 140B); and a base (172A, 172B) disposed between the liquid lens unit (140A, 140B) and the main board, the base (172A, 172B) being configured to transmit the driving signal output from the main board to the liquid lens unit (140A, 140B), wherein the base (172A, 172B) comprises: a body in which the lens holder is disposed; at least one pillar (UP1 to UP4) protruding upwards from the body; and at least one connection part (CP1, CP2) disposed on one surface of the at least one pillar, wherein the least one pillar (UP1 to UP4) comprises a first pillar protruding upwards from the body, the first pillar comprising a stepped portion formed at an upper side thereof, wherein a portion of the first connection substrate is disposed on the stepped portion of the first pillar, and wherein the stepped portion of the first pillar includes a first upper stepped surface and a first lower stepped surface, wherein the first upper stepped surface (S 11) is higher than the first lower stepped surface (S 12) by a first depth, wherein the first connection substrate is disposed on the first upper stepped surface or the first lower stepped surface. a liquid lens unit (140A, 140B), the liquid lens unit (140A, 140B) including a first connection substrate (141A, 141B); a lens holder in which the liquid lens unit (140A, 140B) is disposed; a main board configured to supply a driving signal to drive the liquid lens unit (140A, 140B); and a base (172A, 172B) disposed between the liquid lens unit (140A, 140B) and the main board, the base (172A, 172B) being configured to transmit the driving signal output from the main board to the liquid lens unit (140A, 140B), wherein the base (172A, 172B) comprises: a body in which the lens holder is disposed; at least one pillar (UP1 to UP4) protruding upwards from the body; and at least one connection part (CP1, CP2) disposed on one surface of the at least one pillar, wherein the least one pillar (UP1 to UP4) comprises a first pillar protruding upwards from the body, the first pillar comprising a stepped portion formed at an upper side thereof, wherein a portion of the first connection substrate is disposed on the stepped portion of the first pillar, and wherein the stepped portion of the first pillar includes a first upper stepped surface and a first lower stepped surface, wherein the first upper stepped surface (S 11) is higher than the first lower stepped surface (S 12) by a first depth, wherein the first connection substrate is disposed on the first upper stepped surface or the first lower stepped surface. a body in which the lens holder is disposed; at least one pillar (UP1 to UP4) protruding upwards from the body; and at least one connection part (CP1, CP2) disposed on one surface of the at least one pillar, wherein the least one pillar (UP1 to UP4) comprises a first pillar protruding upwards from the body, the first pillar comprising a stepped portion formed at an upper side thereof, wherein a portion of the first connection substrate is disposed on the stepped portion of the first pillar, and wherein the stepped portion of the first pillar includes a first upper stepped surface and a first lower stepped surface, wherein the first upper stepped surface (S 11) is higher than the first lower stepped surface (S 12) by a first depth, wherein the first connection substrate is disposed on the first upper stepped surface or the first lower stepped surface.