The purpose of the present invention is to provide a hemostatic valve device that is excellent not only in liquid tightness in a slit formed in a valve body, but also in liquid tightness between a housing and the valve body. This hemostatic valve device (100) is a hemostatic valve (20) device which is for a guiding sheath and is provided with a housing (10) and a hemostatic valve (20) mounted on the proximal end side of the housing (10). The hemostatic valve (20) is a double-structure elastic valve in which a first valve body (21) having a slit (23) therein and a second valve body (22) having a through-hole (24) therein with a diameter smaller than the diameter of an inserted device are stacked. A truncated cone-like recess section (17) is formed in the proximal end section of the housing (10). The first valve body (21) has an truncated elliptical cone-like protruding section (25) that can be fitted to the truncated cone-like recess section (17) formed in the housing (10), and the slit (23) is formed along a minor axis of an ellipse which is the shape of the top plate and the bottom plate of the truncated elliptical cone-like protruding section (25).L'objectif de la présente invention est de fournir un dispositif de valve hémostatique qui est excellent non seulement en matière d'étanchéité aux liquides dans une fente formée dans un corps de valve, mais également en étanchéité aux liquides entre un boîtier et le corps de valve. Ce dispositif de valve hémostatique (100) est un dispositif de valve hémostatique (20) qui est destiné à une gaine de guidage et qui est pourvu d'un boîtier (10) et d'une valve hémostatique (20) montée sur le côté d'extrémité proximale du boîtier (10). La valve hémostatique (20) est une valve élastique à double structure dans laquelle un premier corps de valve (21) comportant une fente (23) et un second corps de valve (22) comportant un trou débouchant (24) d'un diamètre inférieur au diamètre d'un dispositif inséré sont superposés. Une section
