Inorganic-organic hybrid material, optical material using the same, and inorganic-organic composite composition

An inorganic-organic hybrid material which:

• comprises an inorganic component and an organic component,
• has a content of the inorganic component of 20-80% by mass,
• comprises a sulfur component in an amount of 1.5-10% by mass in terms of sulfur atom amount,
• has a refractive index of 1.60 or higher, and
• has a tensile elongation measured in accordance with JIS K 6251 of 50% or more,
• wherein, when preparing a strip specimen having a thickness of 1,000 μm, a width of 5 mm and a length of 70 mm by using the inorganic-organic hybrid material and winding the specimen by 180° on a cylindrical metal rod having a diameter of 10 mm at 25° C., the specimen does not crack.