A color interpolation apparatus includes: an area determination unit determining an area between a flat area and an edge area, to which a sampling unit formed with two pixels of the photoelectric device, vertically adjacent to each other, and to be interpolated belongs; a linear interpolation unit performing linear interpolation of the sampling unit determined to belong to a flat area and outputting a luminance signal or a chrominance signal; a weight value calculation unit calculating the weight value of an adjacent sampling unit to be used for weight interpolation of the sampling unit determined to belong to an edge area; and a weight interpolation unit performing weight interpolation of the sampling unit determined to belong to an edge area, by using the weight and outputting a luminance signal or a chrominance signal.