Abstract: A lid for a beverage container includes: a cap main body that attaches to an upper aperture part of a beverage container main body; and a liquid stopping member that is installed on the cap main body in a detachable manner, the cap main body includes a liquid through-hole that is formed by notching a part of an outer periphery of the cap main body, the liquid stopping member engages along external surfaces of liquid through-hole walls that form the liquid through-hole in addition to engaging with an engagement groove that is formed on an external surface of the cap main body, and an airflow opening is formed in a back part of the liquid stopping member.