An object of the present invention is to provide: a rubber-fiber composite obtained by coating a core-sheath fiber with a rubber, in which adhesion between the rubber and the fiber is improved and which is thereby allowed to exhibit an improved durability as compared to conventional rubber-fiber composites when used as a reinforcing material; a rubber-resin composite; and a pneumatic tire using the same. The rubber-fiber composite is obtained by coating a reinforcing material with a rubber, which reinforcing material is composed of a core-sheath type composite fiber whose core portion is constituted by a high-melting-point resin having a melting point of 150 C. or higher and sheath portion is constituted by an olefin-based polymer having a melting point lower than that of the high-melting point resin.

A tire 2 includes a tie gum 24 between a carcass 12 and each chafer 22. In the tire 2, an inner liner 20 is formed from a thermoplastic elastomer composition including a styrene-isobutylene-styrene block copolymer. The inner liner 20 has a thickness of not greater than 1.5 mm. The tie gum 24 joins the inner liner 20 and the chafer 22 and has a volume resistivity of not greater than 10.sup.8 .Math.cm.