A high degree of phase difference detection accuracy can be obtained using a phase difference pixel with a simpler configuration. A solid-state image-capturing device includes a pixel array unit in which a plurality of pixels including a phase difference pixel which is a pixel for focal point detection and an image-capturing pixel which is a pixel for image generation are arranged in a two-dimensional array. In this case, a predetermined layer between a light shielding layer and a micro lens formed in the image-capturing pixel has a higher refraction index than a refraction index of the predetermined layer formed in the phase difference pixel. The technique of the present disclosure can be applied to, for example, a back-illuminated-type solid-state image-capturing device and the like.