Multilayered structural body

A multilayered structural body which comprises, as an integral body:

• (a) at least one layer of a sheet of an ethylene-vinyl alcohol copolymeric resin;
• (b) at least one layer of a hot-melt adhesive resin;
• and
• (c) at least one layer of a sheet of a polystyrene-based resin,
• the layer (b) of the adhesive resin being interposed between and adhesively bonding together the layer (a) and the layer (c) and the ethylene-vinyl alcohol copolymeric resin having a thermal characteristic such that, when the resin is subject to a measurement of DSC (differential scanning calorimetry), the fraction of the integrated value of the area of the peak or peaks in the DSC diagram at 160.degree. C. or below taken by increasing the temperature is at least 30% of the integrated value of the area for all of the peaks over the whole temperature range up to melting point of the resin, and wherein the adhesive resin for the layer (b) has a thermal characteristic such that, when the resin is subjected to a measurement of DSC (differential scanning calorimetry), the DSC diagram taken by increasing the temperature does not have a peak ending at a temperature of 130.degree. C. or higher.;