<p>The present invention provides a rubber composition having improved low-heat-release properties and containing: a rubber component (A) comprising 90-100 mass% of at least one type of diene rubber synthesized by means of solution polymerization and 0-10 mass% of another diene rubber; silica (B) having an n-hexadecyltrimethylammonium bromide (CTAB) adsorption specific surface area measured in compliance with the method described in ASTM D3765-92 of at least 180 m2/g; a silane coupling agent that is a polysulfide compound and/or a thioester compound; and a vulcanization accelerator (D). The rubber composition is characterized by the average aggregate surface area (nm2) of the silica in the rubber composition after vulcanization being no greater than 1700.</p>
