Abstract: Provided is an epoxy resin composition capable of reducing the surface roughness of the surface of a roughening-treated cured body. The epoxy resin composition includes an epoxy resin, a curing agent, and a silica component obtained by performing a surface treatment on silica particles using a silane coupling agent; and the epoxy resin composition does not include a curing accelerator, or includes a curing accelerator at a content equal to or less than 3.5 parts by weight to a total of 100 parts by weight of the epoxy resin and the curing agent. Mean particle diameter of the silica particles is equal to or less than 1 ?m. An amount B (g) of the silane coupling agent used for surface treatment, per 1 g of the silica particles in the silica component, is within a range between 10% to 80% with regard to a value C (g) per 1 g of the silica particles, which is calculated by the following formula (X).

Abstract: Provided is a resin composition, a prepreg, a cured body, a sheet-like formed body, a laminate, and a multilayered laminate using the resin composition, the resin composition including an epoxy resin and an inorganic filler. For example, when a second layer is formed onto the surface of a cured body, the cured body has improved adhesive property or adhesive property between the cured body and the second layer. A resin composition comprising an epoxy resin, a curing agent for the epoxy resin, a silica treated with an imidazole silane and having a mean particle diameter not more than 5 micrometers, the resin composition including the silica at a proportion of 0.1 to 80 parts by weight to a mixture consisting of the epoxy resin and the curing agent for the epoxy resin 100 parts by weight.