To enable preparation of a foamed laminate sheet being excellent in lightweight properties, heat insulating properties, moldability-processability and recycling properties by a method wherein a non-foamed layer constituted of modified polyphenylene ether containing polyphenylene ether of a specified weight is laminated on one or both surfaces of a foamed layer of modified polyphenylene ether.

This sheet is a primary foamed laminate sheet prepared by forming a non-foamed layer of modified polyphenylene ether(PPE) resin on one or both surfaces of a foamed layer of the modified PPE resin. The modified PPE resin forming this foamed layer of the modified PPE resin is a copolymer obtained by modifying PPE resin by polymerization with a styrene monomer or the like. The modified PPE of the non-foamed layer is a copolymer prepared by polymerization of the PPE resin of 1-10wt.% with the styrene monomer or a monomer mixture of 90-99wt.% constituted mainly of the styrene monomer, or a material prepared by mixing this copolymer and at least one kind of the PPE resin with this copolymer or polystyrene resin and by modifying the mixture.