To provide: an inorganic oxide powder which, when filled in a resin material, can simultaneously achieve a high dielectric constant and a low dielectric dissipation factor; a method for producing the same; and a resin composition comprising the inorganic oxide powder.
Provided is an inorganic oxide powder comprising a spherical titanium oxide powder having a rutile phase, wherein the ratio of the rutile phase in the inorganic oxide powder is 90 mass % or more. Further provided is a resin composition comprising the inorganic oxide powder and at least one resin selected from a thermoplastic resin and a thermosetting resin.