A pneumatic tire, comprising a cap tread formed from a rubber composition for tires, the rubber composition having a styrene-butadiene rubber content of 35% by mass or more based on 100% by mass of a rubber component in the rubber composition, the rubber composition comprising: an aromatic vinyl-conjugated diene copolymer in the rubber component, the copolymer comprising aromatic vinyl units derived from an aromatic vinyl compound and conjugated diene units derived from a conjugated diene compound; carbon black; and a silica having a nitrogen adsorption specific surface area measured by the BET method in accordance with ASTM D3037-93 of 40 m 2 /g or more, the copolymer comprising at least 80% of isolated aromatic vinyl units based on the total aromatic vinyl units as determined according to the method described in paragraph of the description, the copolymer having a glass transition temperature width of more than 10°C but less than 20°C as determined by differential scanning calorimetry according to the method described in paragraph of the description, the rubber component including, based on 100% by mass thereof, 1 to 90% by mass of the copolymer and 0 to 40% by mass of an isoprene-based rubber, the rubber composition comprising 10 parts by mass or more of the silica per 100 parts by mass of the rubber component. the rubber composition having a styrene-butadiene rubber content of 35% by mass or more based on 100% by mass of a rubber component in the rubber composition, the rubber composition comprising: an aromatic vinyl-conjugated diene copolymer in the rubber component, the copolymer comprising aromatic vinyl units derived from an aromatic vinyl compound and conjugated diene units derived from a conjugated diene compound; carbon black; and a silica having a nitrogen adsorption specific surface area measured by the BET method in accordance with ASTM D3037-93 of 40 m 2 /g or more, the copolymer comprising at least 80% of isolated aromatic vinyl units based on the total aromatic vinyl units as determined according to the method described in paragraph of the description, the copolymer having a glass transition temperature width of more than 10°C but less than 20°C as determined by differential scanning calorimetry according to the method described in paragraph of the description, the rubber component including, based on 100% by mass thereof, 1 to 90% by mass of the copolymer and 0 to 40% by mass of an isoprene-based rubber, the rubber composition comprising 10 parts by mass or more of the silica per 100 parts by mass of the rubber component. an aromatic vinyl-conjugated diene copolymer in the rubber component, the copolymer comprising aromatic vinyl units derived from an aromatic vinyl compound and conjugated diene units derived from a conjugated diene compound; carbon black; and a silica having a nitrogen adsorption specific surface area measured by the BET method in accordance with ASTM D3037-93 of 40 m 2 /g or more, the copolymer comprising at least 80% of isolated aromatic vinyl units based on the total aromatic vinyl units as determined according to the method described in paragraph of the description, the copolymer having a glass transition temperature width of more than 10°C but less than 20°C as determined by differential scanning calorimetry according to the method described in paragraph of the description, the rubber component including, based on 100% by mass thereof, 1 to 90% by mass of the copolymer and 0 to 40% by mass of an isoprene-based rubber, the rubber composition comprising 10 parts by mass or more of the silica per 100 parts by mass of the rubber component.