PROBLEM TO BE SOLVED: To provide an imaging device capable of preventing flicker of an image which is obtained at focus control by performing the focus control on the basis of phase information from a phase sensor in an imaging optical system in which a focused subject distance is changed in association with change of a field angle, and to provide an endoscope device.SOLUTION: The imaging device includes the imaging optical system having a movable lens 240 for simultaneously adjusting the field angle and the focused subject distance, an imaging element 260, a plurality of phase sensors, an acquisition unit (A/D converter 320) for acquiring the phase information from the plurality of phase sensors, a lens controller 360 for controlling the position of the movable lens 240, and a moving quantity calculation unit 350 for calculating a moving quantity of the movable lens 240 which is necessary to achieve a focused state of an image on the imaging element formed by light beams passing through the imaging optical system on the basis of a phase difference based on the phase information. The lens controller 360 controls the position of the movable lens 240 on the basis of the moving quantity calculated by the moving quantity calculation unit 350.【課題】 画角の変更に伴い合焦被写体距離が変更される撮像光学系において、位相センサからの位相情報に基づいて合焦制御を行うことで、合焦動作時に取得される画像のちらつき等を抑止する撮像装置及び内視鏡装置等を提供すること【解決手段】 撮像装置は、画角と合焦被写体距離を同時に調整する可動レンズ２４０を含む撮像光学系と、撮像素子２６０と、複数の位相センサと、複数の位相センサからの位相情報を取得する取得部（Ａ／Ｄ変換部３２０）と、可動レンズ２４０の位置を制御するレンズ制御部３６０と、位相情報に基づく位相差に基づいて、撮像光学系を通った光線による撮像素子上の像の合焦状態を実現するために必要な可動レンズ２４０の移動量を算出する移動量算出部３５０を含み、レンズ制御部３６０は移動量算出部３５０で算出された移動量に基づいて、可動レンズ２４０の位置を制御する。【選択図】 図１
