Abstract: A non-invasive living body measuring apparatus includes an image capturing section for capturing an image of the irradiated portion of the living body. When the image capturing section captures first and subsequent images of a portion of a living body at different times and the data processing section extracts characteristic patterns from the images, and sets an analysis region in the first image, the data processing section sets an analysis region in subsequent images based on a relative shift amount between the characteristic patterns of the first and subsequent image requisite for matching the characteristic patterns to each other.