A lid structure capable of preventing a lid member from being opened due to a jet stream by using a simple structure is provided. A lid structure includes a lid member configured to cover a housing part of a housing container, and a protrusion disposed near an end of an opposing surface of the lid member, the opposing surface being located on a side of the lid member that is opposed to the housing part when the lid member covers the housing part. The protrusion is disposed in a position that is located outside the housing part when the lid member covers the housing part. The protrusion includes an inclined surface inclined from a direction perpendicular to the opposing surface toward the end of the opposing surface.