To provide a gasket connecting method capable of simplifying gasket connecting work carried out on the job site in a joint of exterior wall surface jointing portion for exterior finishing members of a building, securing a good state of adhesion and considerably decreasing the percentage of occurrence of defect in adhesion.

By using connecting parts having connecting pins which can be internally fitted to a connecting end portion of a ring-shaped gasket, a plurality of ring-shaped gaskets are connected by a recess-projection fitting method through connecting parts, and a sealing compound for adhesion and waterproofing is filled in the connecting region.