An image sensor includes a substrate, a plurality of visible light photosensitive devices, an infrared photosensitive device, a plurality of color filters, an infrared band-pass filter, a micro-lens layer and an infrared filter layer. The plurality of visible light photosensitive devices and the infrared photosensitive device are disposed in the substrate, wherein the plurality of visible light photosensitive devices and the infrared photosensitive device are arranged in an array. The plurality of color filters are respectively disposed to cover the plurality of visible light photosensitive device. In addition, the infrared band-pass filter disposed to cover the infrared photosensitive device. Furthermore, the micro-lens layer is disposed on the plurality of color filters and the infrared band-pass filter. The infrared filter layer is disposed to cover the plurality of visible light photosensitive device.