Abstract: An object of the present disclosure is to provide a rubber composition having superiorly low air permeability and also exhibiting low adhesion to metal members. To achieve the object, a rubber composition includes: a rubber component (A); a layered or tabular clay mineral (B); and a workability-improving agent (C), wherein the rubber composition contains no stearic acid (D) or contains no more than 0.1 parts by mass of stearic acid (D) per 100 parts by mass of the rubber component (A).

Abstract: Provided is a pneumatic tire in which the electrical resistance of the whole tire can be lowered even when the rolling resistance is further reduced by further improving a low loss of a case member of the tire. The pneumatic tire has, as its skeleton, a carcass (1) composed of at least one carcass ply, and includes: a tread rubber (13G) arranged on a tire radial-direction outer side of the carcass (1) in a crown portion; a conductive rubber portion (5) arranged in such a manner to penetrate through the tread rubber from a ground-contact region of a tire surface toward a tire radial-direction inner side; and a rubber chafer (3) arranged on a tire width-direction outer surface of each of the bead portions.