A solvent-free silicone-modified polyimide resin composition having fluidity and including no solvent, the composition containing(A) a silicone-modified polyimide resin of formula (1), Ee-Ff-Gg  (1) (E is formula (2), F is formula (3), and G is a diamine-derived divalent residue; f+e+g=100 mol %, the molar ratio of f/(e+g) is 0.8-1.2) (RA is a divalent hydrocarbon group, R1-R4 are monovalent hydrocarbon groups, R5 and R6 are an alkyl group, aryl group, or aralkyl group; m, n, and o are 0-20, n+o≥1, m+n+o=1-60) -Im-X-Im-  (3) (Im is a cyclic group including a cyclic imide structure, X is a single bond, oxygen, sulfur, sulfide group, sulfone group, carbonyl group, —NRN—, —CRB2—, RArh—, —RArh(ORAr)i—, alkylene group, trivalent group having one H eliminated from said group, or arylene-alkylene group), (B) a polymerizable compound, (C) a polymerization initiator, and (D) hydrophobic fumed silica. This composition has excellent handleability due to its fluidity and thixotropy.