Abstract: Provided are: a rubber composition (a silica master batch) that contains silica in a highly dispersed state, which is prepared by mixing a suspension with an emulsion of an emulsion-polymerized conjugated diene polymer and then coagulating the resultant mixture, wherein the suspension is prepared by highly dispersing wet silica, which does not undergo secondary coagulation yet, or silica, which is prepared by mechanically dissociating secondary coagulation masses of silica, in water and the emulsion-polymerized conjugated diene polymer contains a functional group that is reactive with silica or has high affinity for silica; and a method for producing the rubber composition. A clam (a small mass of a rubber) which contains silica in a highly dispersed state is hardly dried.