The optical unit is provided with a front frame portion for holding an object side fixed lens group, an image side fixed lens group or a rear frame portion for holding an image pickup element, a fixing portion having a fixing section body for holding a front frame portion and a rear frame portion, an object side fixed lens group, and an image side fixed lens group again A movable portion which holds a movable lens group between the image pickup element and slidably disposed in the radial direction of the fixing portion body, and a magnetic portion which is disposed in the movable part and is magnetically polarized in the direction crossing the optical axis of the object side fixed lens group, and the magnetic portion being magnetically polarizedA magnetic Coyle motor, which is disposed on the fixed body body and has a position located outside of the fixed body body in the radial direction relative to the magnetic portion, and is capable of moving the movable part relative to the fixed body body along the direction of the optical axis, and magnetism between the magnetic part and the magnetic part It is provided with an urging member for energizing the movable part by applying the attractive force, and the fixed body body has a maximum dimension in the first direction parallel to the magnetizing direction of the magnetic portion as compared with the maximum dimension in the second direction orthogonal to the first direction and the direction of the optical axis.光学ユニットは、物体側固定レンズ群を保持する前枠部、像側固定レンズ群又は撮像素子を保持する後枠部、並びに前枠部及び後枠部を保持する固定部本体を有する固定部と、物体側固定レンズ群と、像側固定レンズ群又は撮像素子との間で可動レンズ群を保持し、固定部本体の径方向内側に該固定部本体に対して摺動可能に配置される可動部と、可動部に配置されて物体側固定レンズ群の光軸と交差する方向に磁気分極された磁性部、及び固定部本体に配置されて磁性部に対して固定部本体の径方向外側に位置するコイルを有し、可動部を光軸の方向に沿って固定部本体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、磁性部との間で磁性による吸引力を作用させることによって可動部を付勢する付勢部材と、を備え、固定部本体は、磁性部の磁化方向と平行な第1の方向の最大寸法が、第1の方向及び光軸の方向と直交する第2の方向の最大寸法と比して長い。
