Multilayered molten resin mass, multilayered preform for blow molding formed from the multilayered molten resin mass by compression molding, and multilayered container

A multilayered molten resin mass capable of giving a multilayered compression-molded object having a layer distribution in which an intermediate resin layer is located completely between the inner and outer resin layers and is evenly distributed in the peripheral directions. In the multilayered molten resin mass (1) for forming a multilayered compression-molded object, an interlayer resin (3) is embedded in an inner/outer resin (2) constituting the inner and outer layers, the interlayer resin (3) localizing in a lower part of the resin (2), with the distance t between the bottom of the interlayer resin (3) and the bottom of the multilayered molten resin mass (1) being up to 10% of the overall length of the multilayered molten resin mass. The shape of the interlayer resin (3) in the multilayered molten resin mass is regulated so as to be a recessed shape which satisfies the following requirements: y (length of umbrella part of the interlayer resin) >= L (length of central part of the interlayer resin); and 1 > d0 (maximum peripheral-direction outer diameter of the interlayer resin)/D (peripheral-direction outer diameter of the multilayered molten resin mass) >= 0.5.