A specimen container for storing a specimen analyzed by an analyzer, comprising: a cylindrical container body having an opening on an upper end and having a bottom portion on a lower end; a sealing member for sealing said opening of said container body; and a cylindrical body mountable on said container body, having a through-hole continuing from a lower side end to an upper side end and configured to hold the sealing member; wherein said cylindrical body is mounted on said container body, so that said opening of said container body is sealed by said sealing member, wherein the specimen container is formed in a cylindrical shape having said bottom portion, and said sealing member is arranged on a predetermined position between said bottom portion and an upper end of said specimen container, said sealing member is arranged on a position of at least 10% and not more than 80% from said bottom portion with respect to a height of said specimen container, said cylindrical body includes a first engaging portion for engaging with said container body on an end, said container body includes a second engaging portion for engaging with said first engaging potion, and said first engaging portion and said second engaging portion engage with each other, so that said cylindrical body is mounted on said container body, characterized in that: said second engaging portion is a helical male screw portion, said first engaging portion is a female screw portion, said container body is configured to store a specimen, and said sealing member is made of an elastic material and is enabled to be passed through by a needle-shaped suction tube for sucking the specimen stored in said container body, and in that: said sealing member is formed to be fixed by being clipped by said container body and said cylindrical body. a cylindrical container body having an opening on an upper end and having a bottom portion on a lower end; a sealing member for sealing said opening of said container body; and a cylindrical body mountable on said container body, having a through-hole continuing from a lower side end to an upper side end and configured to hold the sealing member; wherein said cylindrical body is mounted on said container body, so that said opening of said container body is sealed by said sealing member, wherein the specimen container is formed in a cylindrical shape having said bottom portion, and said sealing member is arranged on a predetermined position between said bottom portion and an upper end of said specimen container, said sealing member is arranged on a position of at least 10% and not more than 80% from said bottom portion with respect to a height of said specimen container, said cylindrical body includes a first engaging portion for engaging with said container body on an end, said container body includes a second engaging portion for engaging with said first engaging potion, and said first engaging portion and said second engaging portion engage with each other, so that said cylindrical body is mounted on said container body, characterized in that: said second engaging portion is a helical male screw portion, said first engaging portion is a female screw portion, said container body is configured to store a specimen, and said sealing member is made of an elastic material and is enabled to be passed through by a needle-shaped suction tube for sucking the specimen stored in said container body, and in that: said sealing member is formed to be fixed by being clipped by said container body and said cylindrical body. said sealing member is formed to be fixed by being clipped by said container body and said cylindrical body.