本发明提供一种环氧树脂组成物，其借由使用与环氧树脂的兼容性优异的特定的丙烯酸树脂，从而不损害该组成物的黏着力。 该环氧树脂组成物含有：(A)环氧树脂、(B)环氧树脂硬化剂、及(C)液态丙烯酸树脂，其中，丙烯酸树脂(C)的重量平均分子量(Mw)为2000~20000，每1分子的反应性官能基当量为400~10000g/eq，且该丙烯酸树脂中的溶剂含有率为1质量%以下。

Provided is an epoxy resin composition exhibiting an unimpaired adhesion force by employing a particular acrylic resin that is highly compatible with epoxy resins. The epoxy resin composition of the invention contains (A) an epoxy resin; (B) an epoxy resin curing agent; and (C) a liquid acrylic resin, wherein the liquid acrylic resin (C) exhibits a weight-average molecular weight (Mw) of 2,000 to 20,000, a reactive functional group equivalent of 400 to 10,000 g/eq per one molecule, and a solvent content of not higher than 1% by mass.