Abstract: A fiber structure includes a biodegradable polymer fiber, the fiber structure having two or more peaks in a molecular weight distribution obtained by GPC measurement of the biodegradable polymer, and the fiber structure having one or more peaks in each of a region of 100,000 or less of molecular weight and a region of more than 100,000 of molecular weight in the molecular weight distribution obtained by GPC measurement of the biodegradable polymer.

Abstract: A polymer composition contains polylactic acid and a dilactide/?-caprolactone copolymer, in which a content of the polylactic acid relative to a total of 100 mass % of the polylactic acid and the dilactide/?-caprolactone copolymer is 20 to 40 mass %, and in which the dilactide/?-caprolactone copolymer satisfies (1) an R value represented by a following formula is 0.45 or more and 0.99 or less: R = [ AB ] ? / ? ( 2 ? [ A ] ? [ B ] ) × 100 where [A] is a molar fraction (%) of a dilactide residue in the dilactide/?-caprolactone copolymer, [B] is a molar fraction (%) of an ?-caprolactone residue in the dilactide/?-caprolactone copolymer, and [AB] is a molar fraction (%) of a structure in which a dilactide residue and an ?-caprolactone residue are adjacent to each other (A-B and B-A) in the dilactide/?-caprolactone copolymer, and (2) at least one of the dilactide residue and the ?-caprolactone residue has a degree of crystallization of less than 14%.