An endoscope device comprising: a first light source section that emits narrow band light having a -wavelength bandwidth narrowed in accordance with spectral characteristics of emission spectrums of a structure and a component of a living body as a subject, such as the thickness or the like of a blood vessel; a second light source section (32, 24) that emits wide band light having a wide wavelength bandwidth wider than said narrowed bandwidth and including a visible region; an imaging section (12, 26) that captures an image of said subject using light returned from said living body after said narrow band light and said wide band light are simultaneously emitted from said first light source section and said second light source section to said subject, and outputs captured image information; an image processing section that performs a predetermined image processing on said captured image information; and an imaging information detecting section characterized in that said imaging information detecting section detects as imaging information an automatic exposure value e.g. a light amount value, or an imaging magnification for capturing said subject using said imaging section (12, 26), or subject information related to a structure and a component of said living body of said subject captured by said imaging section, wherein said narrow band light emitted from said first light source section has excellent detectability for the structure and the component of said living body of said subject compared to said wide band light emitted from said second light source section (32, 24), and wherein light emission conditions of said first light source section and said second light source section (32, 24) and an image processing condition of said image processing section are changed so as to change detecting and emphasizing degrees of the structure and the component of said living body of said subject based on said imaging information detected by said imaging information detecting section. a first light source section that emits narrow band light having a -wavelength bandwidth narrowed in accordance with spectral characteristics of emission spectrums of a structure and a component of a living body as a subject, such as the thickness or the like of a blood vessel; a second light source section (32, 24) that emits wide band light having a wide wavelength bandwidth wider than said narrowed bandwidth and including a visible region; an imaging section (12, 26) that captures an image of said subject using light returned from said living body after said narrow band light and said wide band light are simultaneously emitted from said first light source section and said second light source section to said subject, and outputs captured image information; an image processing section that performs a predetermined image processing on said captured image information; and an imaging information detecting section characterized in that said imaging information detecting section detects as imaging information an automatic exposure value e.g. a light amount value, or an imaging magnification for capturing said subject using said imaging section (12, 26), or subject information related to a structure and a component of said living body of said subject captured by said imaging section, wherein said narrow band light emitted from said first light source section has excellent detectability for the structure and the component of said living body of said subject compared to said wide band light emitted from said second light source section (32, 24), and wherein light emission conditions of said first light source section and said second light source section (32, 24) and an image processing condition of said image processing section are changed so as to change detecting and emphasizing degrees of the structure and the component of said living body of said subject based on said imaging information detected by said imaging information detecting section.