No. 3 of the present invention VII provides a thermosetting resin composition as described in No. 1 or 2 of the present invention VII, in which the acrylic copolymer (VII-B) having an alkoxysilyl group has a group represented by general formula (VII-3) described below, (in the formula, R6 represents an alkyl group having a carbon number of 1-10, R7 and R8 are a hydrogen atom or a monovalent hydroc