An image display device 4 according to the present invention is an image display device having a display unit 12 capable of still image display of an image picked up inside the body or continuous reproduction of still images. A contour emphasis processing unit 163 that performs contour emphasis processing and a display control unit 161 that causes the display unit 12 to display an image that has undergone the contour emphasis processing by the contour emphasis processing unit 163 are provided. By changing the emphasis level, an image that has been subjected to the contour emphasis process at an optimum emphasis level that is easy to observe both during continuous playback of still images and during still image display is displayed.本発明にかかる画像表示装置４は、体内を撮像した画像の静止画表示または静止画像の連続再生が可能である表示部１２を有する画像表示装置であって、画像に対し、表示内容に応じた輪郭強調処理を行う輪郭強調処理部１６３と、輪郭強調処理部１６３によって輪郭強調処理が行われた画像を表示部１２に表示させる表示制御部１６１とを備え、表示内容に応じて輪郭強調処理の強調レベルを変えて、静止画像の連続再生時と静止画表示時とのいずれにおいても観察しやすい最適な強調レベルで輪郭強調処理が行われた画像を表示する。
