Disclosed is a cross-linked polyimide resin produced by reacting (A) a polyimide siloxane having a ketone group with (B) an amino compound having at least two primary amino groups as functional groups. Each of the amino groups in the amino compound, i.e., the component (B), is reacted with at least a part of the ketone group in the polyimide siloxane, i.e., the component (A), to form a C=N bond. Thus, the cross-linked polyimide resin has such a structure that the polyimide siloxane is crosslinked through the amino compound. When a hydrogen-bond-forming group is contained in the component (A), the formation of the C=N bond can be promoted.
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