To prevent a lid from being opened fraudulently during distribution, by providing a tamper-proof cylinder surrounding a finger hooking part for a lid, and making it difficult to hook a finger or devices around the finger hooking part, thereby making it difficult to open the lid unless the tamper-proof cylinder is separated.

The container has a lid 30 in which the finger hooking part 33 for opening the lid is formed by providing a flange on a fitted cylinder 31, which has been fitted to the external face of a container peripheral wall 3. An outward flange 4 is formed on a portion of the container peripheral wall, which is below the fitted cylinder 31. The output flange 4 is provided with the tamper-proof cylinder 5 surrounding the finger hooking portion 33 of the lid 30. A first breaking line 10 extending axially is formed in the tamper-proof cylinder 5. Also, a second breaking line 20 extending circumferentially is formed in a portion of the outward flange, which is located inside the tamper-proof cylinder 5. After the first breaking line 10 is broken, the broken portion of the tamper-proof cylinder is pulled outward. Thereby, the second breaking line 20 is broken and consequently the tamper-proof cylinder 5 is separated from the container body 1. As a result, the finger hooking part 33 for the lid 30 is exposed to enable the lid 30 to be opened.