To provide a resin composition that gives a cured product having excellent heat resistance and crack resistance.SOLUTION: A resin composition contains (A) an epoxy resin, (B) an inorganic filler, and (C) a non-reactive phosphazene compound, When a nonvolatile component in the resin composition is 100 mass percent, the content of (C) component is 0.2 mass percent to 1.0 mass percent.SELECTED DRAWING: None

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