The image pickup device 1 where heater the heater device 13 which consists of 11 and temperature sensor 12 from the effective light ray range of objective optical system with outside, distribution facilities is done with the inner skin of the hard component 2 containment cover glass 3 with the specified void, with the elastic member 17 of the projection framework 22a rim section containment the glass lens 21a of the Tip, in cover glass 3 the pushing is overpowered. In addition, opposing mutually the electric terminal area of heater 11 of image pickup device 1 and the electric terminal area of temperature sensor 12 the side whose light ray height of the effective light ray of objective optical system relatively is lower than the Tip surface of glass lens 21a of Tip side of pre-group glass lens unit 20 on end face side of the rear, at the same time vis-a-vis the optical axis, it is laid out.ヒーター11および温度センサ12からなるヒータデバイス13は、対物光学系の有効光線範囲より外側で、カバーガラス3を保持する硬性部材2の内周面との間に所定の空隙を持って配設され、先端のレンズ21aを保持する突出枠22a外周部の弾性部材17により、カバーガラス3に押圧されている撮像装置1。また、撮像装置1のヒーター11の電気接続部および温度センサ12の電気接続部が前群レンズユニット20の先端側のレンズ21aの先端面よりも後方の基端側で対物光学系の有効光線の光線高さが相対的に低い側、かつ光軸に対して互いに対向して配置されている。
