Curable composition

A curable composition comprising a polymerizable monomer (A), an organic-inorganic composite filler (B), and a polymerization initiator (C),

• wherein the organic-inorganic composite filler (B) comprises an organic resin matrix (b1) and a spherical inorganic filler (b2) having an average primary particle size of 230 nm to 1,000 nm, 90% or more of the number of individual particles constituting the spherical inorganic filler (b2) are present in a range of 5% greater or less than the average primary particle size, and the following formulae (1) and (2) are satisfied:
• nP<nFb2 (1)
• wherein nP represents the refractive index of a polymer of the polymerizable monomer (A) at 25° C.;
• and nFb2 represents the refractive index of the spherical inorganic filler (b2) at 25° C.,
• nMb1<nFb2 (2)
• wherein nMb1 represents the refractive index of the organic resin matrix (b1) at 25° C.;
• and nFb2 represents the refractive index of the spherical inorganic filler (b2) at 25° C.;
• and
• wherein when a spectral reflectance of a cured product having a thickness of 1 mm of the curable composition is measured using a color difference meter on a black background, the maximum point of the reflectance has a wavelength (peak wavelength) of 550 nm to 770 nm.