Barrier multi-layer polyester molding body

The present invention includes a base component comprising a thermoplastic polyester resin A, and a subcomponent including a thermoplastic resin B, and melted in respective separate extruders, through the static mixer the left base component and secondary component in the molten state in a barrier multilayer polyester molded article mainly comprising a layer of a multilayer structure obtained by molding a cyclic ester oligomer content of the thermoplastic polyester resin a contains it is a cyclic ester oligomer content of melt polycondensation polyester is 70% or less, and be the barrier multilayer polyester molded article laminated on at least three or more layers wherein the X layer consisting of the base component in the Y-layer and the thickness direction consisting of secondary components in layers of the multilayer structure , and it provides an excellent barrier multilayer polyester moldings mechanical properties without gas barrier properties and delamination.