A heating apparatus and a cleaner having the same are disclosed. The heating apparatus includes a heating casing to receive water from a water container and convert the water into steam, wherein the heating casing comprises a plurality of ribs and each successive rib comprises a space to collect water and convert the water into steam. The cleaner includes a cleaner body in which a water container is detachably mounted, a nozzle assembly rotatably connected to a lower part of the cleaner body and including a nozzle to inject steam, and a heating apparatus that includes a heating casing to receive water from the water container, convert the water into steam, and supply the steam to the nozzle assembly, wherein the heating casing includes a plurality of ribs and each successive rib includes a space to collect water and convert the water into steam.