A camera module , comprising: a liquid lens unit , the liquid lens unit including a first connection substrate ; a lens holder in which the liquid lens unit is disposed; a main board configured to supply a driving signal to drive the liquid lens unit ; and a base disposed between the liquid lens unit and the main board , the base being configured to transmit the driving signal output from the main board to the liquid lens unit , wherein the base comprises: a body (BO) in which the lens holder is disposed; at least one pillar (UP1 to UP4) protruding upwards from the body (BO); 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 (UP1) protruding upwards from the body (BO), the first pillar (UP1) 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 (UP1), and wherein the stepped portion of the first pillar (UP1) includes a first upper stepped surface (S11) and a first lower stepped surface (S12), wherein the first upper stepped surface (S 11) is higher than the first lower stepped surface (S 12) by a first depth (D1), wherein the first connection substrate is disposed on the first upper stepped surface (S11) or the first lower stepped surface (S12). a liquid lens unit , the liquid lens unit including a first connection substrate ; a lens holder in which the liquid lens unit is disposed; a main board configured to supply a driving signal to drive the liquid lens unit ; and a base disposed between the liquid lens unit and the main board , the base being configured to transmit the driving signal output from the main board to the liquid lens unit , wherein the base comprises: a body (BO) in which the lens holder is disposed; at least one pillar (UP1 to UP4) protruding upwards from the body (BO); 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 (UP1) protruding upwards from the body (BO), the first pillar (UP1) 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 (UP1), and wherein the stepped portion of the first pillar (UP1) includes a first upper stepped surface (S11) and a first lower stepped surface (S12), wherein the first upper stepped surface (S 11) is higher than the first lower stepped surface (S 12) by a first depth (D1), wherein the first connection substrate is disposed on the first upper stepped surface (S11) or the first lower stepped surface (S12). a body (BO) in which the lens holder is disposed; at least one pillar (UP1 to UP4) protruding upwards from the body (BO); 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 (UP1) protruding upwards from the body (BO), the first pillar (UP1) 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 (UP1), and wherein the stepped portion of the first pillar (UP1) includes a first upper stepped surface (S11) and a first lower stepped surface (S12), wherein the first upper stepped surface (S 11) is higher than the first lower stepped surface (S 12) by a first depth (D1), wherein the first connection substrate is disposed on the first upper stepped surface (S11) or the first lower stepped surface (S12). <EOS>