The light scanning observation apparatus includes a light source unit that supplies illumination light, a light guide unit that guides the illumination light and emits from the exit end portion, and swings the exit end to displace the irradiation position of the illumination light An actuator section, a control section for performing control for swinging the exit end section so as to depict a predetermined scanning path, and an image for one frame corresponding to the nearest scanning path in a predetermined scanning path are sequentially generated A motion detection unit which sequentially calculates a motion amount of an image between different frames a motion detection unit which sequentially calculates a motion amount of an image between different frames And an image output unit which successively outputs corresponding images and continuously outputs images corresponding to the same scanning path in a predetermined scanning path when the amount of movement is equal to or less than a predetermined threshold value.光走査型観察装置は、照明光を供給する光源部と、照明光を導光して出射端部から出射する導光部と、出射端部を揺動して照明光の照射位置を変位させるアクチュエータ部と、所定の走査経路を描くように出射端部を揺動させるための制御を行う制御部と、所定の走査経路のうちの直近の走査経路に応じた1フレーム分の画像を順次生成して出力する画像生成部と、異なるフレーム間の画像の動き量を順次算出する動き検出部と、動き量が所定の閾値を超えている際に、所定の走査経路における異なる複数の走査経路に応じた画像を順次出力し、動き量が所定の閾値以下である際に、所定の走査経路における同一の走査経路に応じた画像を連続的に出力する画像出力部と、を有する。
