To provide a valve device suppressing a leak-rate to a minimum limit to be improved so as to satisfy strict safety requirement by slight expense of constitution.

A housing 2 and a closing member 8 rotatably connecting a shaft 10 are included, a passage of the shaft passing through the housing 2 is sealed by a first seal member 32. In the inside of this valve device, linings 20, 21 are applied. The first seal member 32, in some cases, with at least partly a second seal member 42, is arranged in the inside of an annular unit connected to the housing 2. The lining 20 of the housing 2 at least leads to the first seal member 32 directly in contact with the lining 20, the first seal member 32, when necessary, together with also a second seal member 42, is compressed by a bush movable in a direction a rotary shaft of the shaft 10.