A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core and a bead apex therein, each sidewall portion provided on the outer face with means of escaping air between the tire and a mold for vulcanizing the tire, wherein the air escape means comprises a circumferentially extending vent emboss line disposed adjacently to a radially outer end of the bead apex and a circumferentially extending vent groove adjoining the radially outside of the vent emboss line and having a depth of at least 0.15 mm. Preferably, the vent groove has a width of from 5 to 10 mm and a depth of from 0.2 to 0.5 mm, and the vent emboss line and vent groove are disposed in a lower sidewall region having a substantially straight profile. The bottom of the vent groove may be substantially parallel to the straight profile of the lower sidewall region and the bottom may be provided with emboss marks.