An image capturing unit includes a camera, an assembled lens that is connected to the camera and that magnifies a region to be imaged, a cover lens that covers an objective lens of the assembled lens, a fluid spray nozzle that sprays a fluid including water to the cover lens, a fluid removing nozzle that blows air to the cover lens to remove the fluid deposited on the cover lens, and a cutting water removing nozzle that blows air to a wafer positioned at a position directly under the cover lens, to remove cutting water stagnating on an upper surface of the wafer.