The present invention relates to a multilayer injection molded article comprising a layer of a barrier resin composition including (A) 10 to 70% by mass of a polyamide resin including a diamine constitutional unit 70 mol% or more of which is derived from m-xylylenediamine and a dicarboxylic acid constitutional unit 70 mol% or more of which is derived from a dicarboxylic acid containing a C 4 to C 20 α,ω-linear aliphatic dicarboxylic acid and isophthalic acid at a molar ratio of from 30:70 to 100:0, (B) 90 to 30% by mass of a modified polyolefin, and the like; and
an injection molded article including (A) 10 to 60% by mass of the polyamide resin and (E) 40 to 90% by mass of a polyolefin wherein at least a part of the polyamide (A) is dispersed in a layered state. These molded articles are excellent in barrier property.