PROBLEM TO BE SOLVED: To provide an antibacterial and antifungal fiber structure having excellent antibacterial and antifungal properties even if a fiber structure obtained by combining a polyester fiber and other fibers is subjecting to a treatment at a relatively low temperature under normal pressure.SOLUTION: There is provided a fiber structure obtained by combining a polyester fiber and other fibers, in which an antibacterial and antifungal agent (A) is fixed to the fiber structure with a fixation aid (B) for an antibacterial and antifungal agent, where the antibacterial and antifungal agent (A) is a pyridine-based antibacterial and antifungal agent and the fixation aid (B) for an antibacterial and antifungal agent is at least one compound selected from the group consisting of a first group (b1) comprising surfactants, a second group (b2) comprising organic solvents, and a third group (b3) comprising aromatic compounds and urea-based compounds.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】常圧下、比較的低い温度で加工されたポリエステル混合繊維構造物であっても、優れた抗菌・抗かび性を備えた抗菌・抗かび性繊維構造物を提供する。【解決手段】抗菌・抗かび剤（Ａ）と、抗菌・抗かび剤固定補助剤（Ｂ）とを含有し、上記抗菌・抗かび剤（Ａ）が、ピリジン系抗菌・抗かび剤であり、上記抗菌・抗かび剤固定補助剤（Ｂ）が、界面活性剤からなる第１群（ｂ１）、有機溶媒からなる第２群（ｂ２）、芳香族系化合物および尿素系化合物からなる第３群（ｂ３）から選択される少なくとも一つの化合物であり、ポリエステル混合繊維構造物の繊維内に、上記抗菌・抗かび剤（Ａ）が、上記抗菌・抗かび剤固定補助剤（Ｂ）とともに固定されている。【選択図】なし
