Abstract: A lid for a beverage container includes: a cap main body that adheres to an upper aperture part of a beverage container main body and includes a liquid through-hole, and a sliding cap that is installed on the cap main body in a detachable manner by engaging in a sliding manner, and that opens and closes the liquid through-hole by sliding, an elastic clicking part is provided on side surfaces of the sliding cap, clicking reception parts are formed in the cap main body, and the sliding cap is held by the cap main body when the elastic clicking part engages with the clicking reception parts.