The invention provides a pneumatic tire using a rib pattern which can guarantee the traction property or sideslip resistance and can improve the partial abrasion resistance. A shallow groove (31) extending in a zigzag manner at the shoulder rib is formed on the rib (21) of the tire shoulder, and a shallow groove (32) extending in the tire width direction and arranged at regular intervals in the tire circumferential direction at inner mediate rib (23) and center rib (24). The depths of the shallow grooves (31,32) are arranged to be 10-40% of the depth of the main groove. A wall of each section divided by the shallow groove (32) includes a central wall surface (51,61) extending from one end on an interior widthwise of a center main groove to an other end on an exterior widthwise of the center main groove, a first wall surface (52,62) extending from the one end of the central wall surface (51,61), and a second wall surface (53,63) extending from the other end of the central wall surface (51,61). The first wall surfaces (52,62) of the inner mediate rib (23) and the first wall surfaces (52,62) of the center rib (24) are mutually opposed across the center main groove (13).