Provided is a coating apparatus in which a liquid substance is less likely to splash around and a chemical solution can be coated on a specific region of the inside surface of a tubular container. The coating apparatus 10 includes a spraying direction changing member 12, fixed to a tip portion of a spray nozzle 4 with an inner tube 6 and an outer tube 7, for changing the direction of spray of a sol oriented outward to a direction intersecting a direction of discharge of the liquid substance from the inner tube 6.