To provide a joined article which can be peeled efficiently by an easy method into two members having been joined together through a joining film.

The joined article has a joining film 3 which joins the joining surface of a first substrate 21 and a joining surface of a second substrate 22 together. The joining film 3 includes a silicone material and a heat-discoloration material which is discolored by the heating at a prescribed temperature or above. By giving heat energy of a prescribed temperature or above as peeling energy to the joining film 3, a part of a molecular bond constituting the silicone material is cut to form cleavage in the joining film 3 so that interlayer exfoliation is caused in at least one part of the joining film 3, and the place of the intrerlayer exfoliation can be recognized visually by generating discoloration in the heat-discoloration material.