A component notification device includes a determination section and a notification section. When a component container accommodating a component to be mounted on a board is exposed to the atmosphere, the determination section determines whether the component accommodated in the component container is a management target component requiring humidity management. When the determination section determines that the component is the management target component, the notification section notifies the presence of the management target component through at least one of visual, auditory, and tactile senses of a worker.