A method of producing inorganic-particle-combined fiber includes: a beating step including beating chemical fiber in a wet manner or a dry manner; and a composite fiber forming step including forming inorganic-particle-combined fiber which is composite fiber composed of the chemical fiber and inorganic particles, the composite fiber forming step including synthesizing the inorganic particles in a slurry that contains the chemical fiber after the beating step.

A method of producing inorganic-particle-combined fiber includes: a beating step including beating chemical fiber in a wet manner or a dry manner; and a composite fiber forming step including forming inorganic-particle-combined fiber which is composite fiber composed of the chemical fiber and inorganic particles, the composite fiber forming step including synthesizing the inorganic particles in a slurry that contains the chemical fiber after the beating step.