To provide a structure capable of ensuring the airtight performance of a cylindrical container main body side and to improve assembling workability.

A locking projection 21 is formed at the upper position of the vertical slit 22 of an inner cylindrical body 20 and a ring-like inner tool 40 for surrounding the inner cylindrical body 20 is mounted between the inner cylindrical body 20 and a cylindrical cap 2. An annular elastic sealing member 50 for holding the locking projection 21 of the inner cylindrical body 20 from upper and lower directions is disposed on the inner part of the inner tool 40. A projection part 51 to be in press-contact with the outer peripheral surface of the inner cylindrical body 20 and an elastic flexible part 54 to be in elastic contact with the outer peripheral surface of the inner cylindrical body 20 are formed on the elastic sealing member 50 or the locking projection 21 of the inner cylindrical body 20 is brought into press-contact with the inner surface of the elastic sealing member 50.