To easily remove dirt and dust accumulated in the joints of wall surfaces finished with tile as interior and exterior finishes of houses, buildings or the like.

A joint tape for a wall surface finished with tile is sequentially adhered; fluororesin film 1 for first layer; aluminum foil 2 for second layer; soft thermoplastic resin sheet 3 for third layer; separating paper 4 as fourth layer. In this case, as fluororesin film 1, PFA, FEP and ETFE fluororesin films are selected, and the fluororesin film 1 and the aluminum foil 2 are adhered with a fluorine-based adhesive 1-2.