The distance measuring camera includes a first imaging system for obtaining a first image, a second imaging system for obtaining a second image and a size obtaining part 3 for measuring a distance between a plurality of feature points of a first subject in the first image to obtain a size of the first subject image and measuring a distance between a plurality of feature points of a second subject image in the second image to obtain a size of the second subject image. The size obtaining part 3 searches pixels on an epipolar line only in a search area of the second image in which a first imaging area corresponding to the first image can be overlapped with a second imaging area corresponding to the second image to detect the plurality of feature points of the second subject image.