To obtain a molding having sufficient mechanical strengths from a sugar chain polymer compound having both biodegradability and recyclability by using a composition prepared by dispersing a reinforcing filler in a sugar chain polymer compound.

A sugar chain polymer compound of the formula is used. In the formula, G is a sugar residue in which the hydroxyl groups not taking part in polymerization may be replaced by substituents; R is an optionally substituted aliphatic hydrocarbon group; and n is 1-5,000. The sugar chain polymer compound is obtained by dehydratively condensing a saccharide with an aliphatic dicarboxylic acid. The saccharide used is exemplified by an oligosaccharide or a monosaccharide. Among the oligosaccharides, maltose, lactose, and cellobiose are especially desirable, and among the monosaccharides, glucopyranose is particularly desirable. The reinforcing filler used is exemplified by a glass fiber or a carbon fiber. The amount of the reinforcing filter is desirably about 5-80 wt.% based on the total weight of the molding.