Abstract: Disclosed are: a particle-containing composition that contains inorganic particles (A) and particles (B) other than the particles (A), wherein the inorganic particles (A) are at least one selected from the group consisting of easily disintegrable inorganic particles (A1) having an average particle diameter DA1 of 1 ?m or more and 50 ?m or less, and having a surface roughness Ra of 10 nm or more and 50 nm or less, and inorganic particles (A2) having an average particle diameter DA2 of less than 1 ?m, and having an average primary particle diameter dA2 of 3 nm or more and 50 nm or less, and the particles (B) are particles having an average particle diameter DB of 1 ?m or more and 50 ?m or less, and coated on the surfaces thereof with a polymer (C) having a hydrogen bond-accepting bond or a hydrogen bond-accepting functional group; and a method for producing the particle-containing composition, and a method for suppressing adhesion of air harmful substances using the particle-containing composition.