To provide a fiber structure that has durable antistatic properties, excellent deodorizing properties of excrement smell and antimicrobial properties.

The fiber structure includes a polyalkylene oxide segment containing an inorganic fine particle as both terminals of a main chain or one terminal or the side chain of the main chain, has a coating film obtained by polymerizing a polymerizable monomer containing at least two acrylic groups and/or methacrylic groups on the surface of a fiber, has a weight mixing ratio of the polymerizable monomer/the inorganic fine particle of 1/0.4-1.0, contains a composition composed of a photocatalytic semiconductor, a carboxylic acid compound, a metal and a porous substance on the surface and/or the inside of the coating film and contains an antimicrobial agent on the surface and/or the inside of the coating film or inside of the fiber.