PROBLEM TO BE SOLVED: To provide an epoxy resin composition effective for reducing surface roughness of a cured material subjected to roughening treatment and lowering linear expansion coefficient of even a cured material having a low content of inorganic materials, and to provide the cured material.;SOLUTION: The epoxy resin composition contains an epoxy resin, a phenolic resin having a triazine skeleton, silica and a maleimide compound, wherein the phenolic resin has a weight-average molecular weight of ≤1,500. The cured material 1 is produced by heating the epoxy resin composition to obtain a procured material and roughening the material.;COPYRIGHT: (C)2011,JPO&INPIT
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