Provided is a heavy-duty tire comprising a tread, a carcass, and a belt layer, wherein the tread is composed of a rubber composition comprising: a rubber component comprising an isoprene-based rubber; and a copolymer resin comprising styrene and cyclopentadiene as monomer components, and wherein S/(a/b) is greater than 7.0, when a=C1/T1 and b=C2/T2 are defined, where S represents a total styrene amount, in % by mass, in the rubber composition constituting the tread, C1 represents a content, in % by mass, of an isoprene-based rubber in the rubber composition constituting the tread, T1 represents a total thickness, in mm, of the tread, C2 represents an average content of an isoprene-based rubber in the belt topping rubber covering the belt layer, and T2 represents a total thickness, in mm, of the belt layer.
