PURPOSE: To provide a seal fastener structure whose engagement workability is satisfactory, and also, whose durability is satisfactory. ;CONSTITUTION: In this seal fastener structure arranged between each end edge in order to open and close each end edge concerned of a sheet body 7, and in this seal fastener structure of the constitution consisting of a belt-like engagement projecting line part 13 formed along one end edge of the sheet body 7 and provided with a bulge detaining part 14 in the tip, and a belt-like part to be engaged, formed by a rubber-like elastic body along an end edge of the other sheet body, and provided with an angaging groove 17 engaged to the engagement projecting line part 13, an insert 15 to be held, consisting of a linear spring material and having a waveform plane is embedded in the engagement projecting line part 13, rigidity in the engaging direction is imparted to the engagement projecting part 13, and also, in the outside peripheral part of the engaging groove 17, a holding insert 19A consisting of a linear spring material, and being an eggplant shape whose cross section shape doe not have substantially a corner part is embedded, and holding force is imparted between opening end parts of the part to be engaged.;COPYRIGHT: (C)1994,JPO&Japio
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