The optical unit has a cylindrical shape that holds at least one of the object-side fixed lens group and the image-side fixed lens group, and a plurality of hollow portions are equally spaced at positions symmetrical to the central axis of the cylindrical shape. The movable lens group is held between the fixed part formed by the object side fixed lens group and the image side fixed lens group, and is arranged to be slidable with respect to the fixed part on the radially inner side of the fixed part. A cylindrical movable part having the same central axis, a coil disposed in the fixed part, and a magnetic polarization in a direction intersecting the central axis disposed in the movable part, and disposed substantially symmetrically with respect to the central axis, A voice coil motor having a plurality of magnets respectively arranged on the movable part so as to enter the respective hollowed parts of the fixed part, and capable of moving the movable part relative to the fixed part along the central axis direction； And perpendicular to the central axis among the plurality of magnets At least two magnets adjacent to each other in the plane in the circumferential direction, is arranged close to the circumferential direction of the opposite directions to each other.光学ユニットは、少なくとも物体側固定レンズ群及び像側固定レンズ群のいずれか１つを保持する筒形状をなし、該筒形状の中心軸に対して対称な位置に複数の肉抜き部が等間隔で形成された固定部と、物体側固定レンズ群と像側固定レンズ群の間で可動レンズ群を保持し、固定部の径方向内側に固定部に対して摺動可能に配置され、固定部と同じ中心軸を有する筒形状の可動部と、固定部に配置されたコイル、及び可動部に配置されて中心軸に交差する方向に磁気分極され、中心軸に対して略対称に配置され、固定部の各肉抜き部内に入るように可動部にそれぞれ配置された複数の磁石を有し、可動部を中心軸方向に沿って固定部に対して相対移動させることが可能なボイスコイルモータと、を備え、複数の磁石のうち、中心軸と直交する断面において周方向に隣り合う少なくとも２つの磁石を、互いに周方向の反対向きに寄せて配置する。
