An object of the present invention is to provide a driving device for an observation light switching mechanism that can suppress the overload to the driving motor and realize downsizing, and for this purpose, the driving device of the present invention has a predetermined wavelength characteristic. An optical filter 32 for generating light is arranged, a filter part 42 capable of arranging the optical filter in a first position and a second position different from the first position, and a convex part 42x provided in the filter part. And the first groove portion 43d that the convex portion is in contact with, and the optical filter is moved from the first position to the second position by rotating around the predetermined rotation axis 41d and moving the convex portion along the first groove portion. And a second groove 43e provided along the tangential direction of the convex portion centering on the rotation axis of the transmission unit in a state where the optical filter provided in the transmission unit is moved to the second position. And have.本発明は、駆動モータへの過負荷を抑制し小型化を実現し得る観察光切換機構の駆動装置を提供することを目的とし、そのために、本発明の駆動装置は、所定の波長特性を有する光を発生させるための光学フィルタ３２が配置され、光学フィルタを第１の位置と第１の位置とは異なる第２の位置とに配置可能なフィルタ部４２と、フィルタ部に設けられる凸部４２ｘと、凸部が接する第１の溝部４３ｄを有し所定の回転軸４１ｄを中心に回転し凸部を第１の溝部に沿って移動させることで光学フィルタを第１の位置から第２の位置に移動させる伝達部４３と、伝達部に設けられ光学フィルタが第２の位置に移動された状態において伝達部の回転軸を中心とする凸部の接線方向に沿って設けられる第２の溝部４３ｅとを有する。
