To provide a lid with an additive capable of easily storing the additive in a state of the lid being stacked, not increasing garbage and capable of easily adding the additive.

The lid satisfies the following requirements. That is, the lid is shaped so that it can be stacked on each other; a through-hole can be formed in a housing space made by a circumferential wall and a ceiling plate by pulling out a penetrating member, an additive container housing the additive and tightly closed is housed in it and a part of the additive container is fixed to the ceiling plate; a throughhole for the penetrating member to penetrate the additive container vertically is mounted on the ceiling plate; and the additive container has a thickness large enough not to prevent stacking of the lids.