(57) [summary] [purpose] is a good seal of the double doors back door of the car, to provide a weather strip that does not water leakage. [Configuration] inner weather strip 50 with a hollow seal portion 52 over the edge substantially the entire length on top of the main body 10 And, 2 at the center of the double doors type of back door 20 To one 30 of the doors 30 and 40, fills the space formed on both of the connecting portion, and to attach said the inner weather strip 50 and the elastic-contact center weatherstrip 60, respectively. And an inner weather strip, out of the hollow seal portion 52 of the inner weather strip 50, combines the thread forming part 53 of the trapezoidal shape on top of the center weather strip 60 and the bullet contact part, and the thread forming the flat the rear surface of the part 53 as well as the vertical surface 54, the height H of the center weather strip 60 also are the same height as the thread forming portion 53 of the inner weather strip 50.
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