A light source (3) that irradiates the subject (X) with illumination light and special light that acts on a specific area of the subject (X), and return light from the subject (X) by illumination light irradiation. A return light image generation unit (61) that captures and generates a return light image (G1), and a special light that generates a special light image (G2) by capturing signal light from the subject (X) that is irradiated with the special light In the region corresponding to the extracted specific region with respect to the light image generation unit (62), the extraction unit (63) that extracts a specific region from the special light image (G2), and the return light image (G1) An observation device (100) including an enhancement processing unit (64) for performing enhancement processing based on return light image information is provided.被検体(X)に対して照明光と被検体(X)の特定の領域に作用する特殊光とを照射する光源(3)と、照明光の照射による被検体(X)からの戻り光を撮影して戻り光画像(G1)を生成する戻り光画像生成部(61)と、特殊光の照射による被検体(X)からの信号光を撮影して特殊光画像(G2)を生成する特殊光画像生成部(62)と、特殊光画像(G2)から特定の領域を抽出する抽出部(63)と、戻り光画像(G1)に対して、抽出された特定の領域に対応する領域において、戻り光画像情報に基づいた強調処理を施す強調処理部(64)とを備える観察装置(100)を提供する。