Provided are a joined product in which a polypropylene resin and an addition-curing silicone rubber are firmly joined together, and a method for producing the same. A joined product obtained by joining a dry-treated polypropylene resin and an addition-curing silicone rubber with a primer composition, wherein the primer composition comprises (a) a silane compound in which a 3-aminopropyl group is bonded to a silicon atom, (B) a silane compound having one or more epoxy group-containing organic groups in one molecule, (C) a platinum group metal catalyst, wherein a molar ratio of a nitrogen atom contained in the component (a) to a platinum atom contained in the component (C) is 50:1 to 1:1. None

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