An endoscope apparatus according to the present invention includes: a light source unit that emits white illumination light or narrow band illumination light an image sensor having a plurality of pixels a color filter including a filter unit arranged corresponding to the plurality of pixels, the filter unit including a plurality of filters including a filter for passing blue light, and a filter for passing blue light and at least one of green light and red light, the number of filters for passing green light being not less than half of the number of all filters, and the number of filters for passing blue light being not less than the number of filters for passing green light a luminance component pixel selecting unit that selects a luminance component pixel according to illumination light and a demosaicing processing unit that generates a color image signal based on the luminance component pixel.
