PROBLEM TO BE SOLVED: To provide a lid for a container capable of reducing the opening/closing torque of the lid without impairing the tightness of the container and facilitating the opening/closing. A lid 40 for a container is screwed to a tubular opening 24 extending from the container 20. The lid 40 for a container is an outer lid 41 having a threaded portion 43 that is screwed to the outer peripheral surface of the tubular mouth portion 24, and a tubular shape attached to the outer lid 41 so as to be rotatable and immovable up and down outside a predetermined range. And an inner lid 61 having a sealing material 71 crushed by the inner peripheral surface 29 of the mouth portion 24. [Selection diagram] Figure 2【課題】容器の密閉性を損なうことなく蓋の開閉トルクを軽減させ、開閉を容易にすることができる容器用の蓋を提供する。【解決手段】容器20から延びる筒状口部24に、ねじ結合される容器用の蓋40である。容器用の蓋40は、筒状口部24の外周面にねじ結合するねじ部43を有する外蓋41と、この外蓋41に回転可能に且つ所定範囲外で上下動不能に取付けられ筒状口部24の内周面29で潰されるシール材71を有する内蓋61とを備えている。【選択図】図2