To provide a barrier cap which maintains breaking property and is excellent in gas barrier property.SOLUTION: A barrier cap is composed of a cap body mounted on a mouth of a container body and an upper lid mounted on the cap body, where the cap body has a pouring cylinder, has a thin-walled weakened part provided in the pouring cylinder and forms a pouring port by breaking the thin-walled weakened part, and enables unplugging, in which the cap body is obtained by blending a barrier resin having gas barrier property with a basic resin of the cap body.SELECTED DRAWING: Figure 1

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