A plug apparatus includes a main body, and a plurality of plugs. The plugs have different plug tips of different recognized standards. The plugs are capable of electrically and detachably sleeving on each other. Each plug is also capable of electrically and detachably sleeving on the main body. When one of the plugs (a first plug) sleeves on the other plug (a second plug), the plug tip of the second plug is hidden by the first plug.