A pneumatic tire comprising: a zigzag circumferential direction groove that is formed in a tread portion by alternating and continuously formed first inclined portions and pairs of second inclined portions, the first inclined portions being inclined with respect to a tire circumferential direction and the pairs of second inclined portions being inclined angled with respect to the first inclined portions and with respect to the tire circumferential direction, such that each second inclined portion of a pair of second inclined portions respectively extends from one of the opposing ends of a first inclined portion, in opposite direction; first lug grooves that are inclined in the same direction as the first inclined portions with respect to the tire circumferential direction and that merge with the first inclined portions; and pairs of second lug grooves that are angled with respect to the first inclined portions and with respect to the tire circumferential direction, and that intersect the first inclined portions, each second lung groove of a pair of second lug grooves extending from one of the opposing sides of a first inclined portion, in opposite direction, wherein: one of the pairs of second inclined portions, one of the first lug grooves and one of the pairs of second lug grooves merge with one of the first inclined portions, characterized in that a pattern, formed by the zigzag circumferential direction groove, the first lug grooves, and the pairs of second lug grooves, comprises a pair of same patterns (A, B) that are both formed about a tire equatorial plane and that are offset with respect to each other by half a pitch in the tire circumferential direction, and the first lug grooves of one pattern of a pair of patterns and the second lug grooves of the other pattern of the pair of patterns merge with each other in a straight-line shape so as to cross the tire equatorial plane. a zigzag circumferential direction groove that is formed in a tread portion by alternating and continuously formed first inclined portions and pairs of second inclined portions, the first inclined portions being inclined with respect to a tire circumferential direction and the pairs of second inclined portions being inclined angled with respect to the first inclined portions and with respect to the tire circumferential direction, such that each second inclined portion of a pair of second inclined portions respectively extends from one of the opposing ends of a first inclined portion, in opposite direction; first lug grooves that are inclined in the same direction as the first inclined portions with respect to the tire circumferential direction and that merge with the first inclined portions; and pairs of second lug grooves that are angled with respect to the first inclined portions and with respect to the tire circumferential direction, and that intersect the first inclined portions, each second lung groove of a pair of second lug grooves extending from one of the opposing sides of a first inclined portion, in opposite direction, wherein: one of the pairs of second inclined portions, one of the first lug grooves and one of the pairs of second lug grooves merge with one of the first inclined portions, characterized in that a pattern, formed by the zigzag circumferential direction groove, the first lug grooves, and the pairs of second lug grooves, comprises a pair of same patterns (A, B) that are both formed about a tire equatorial plane and that are offset with respect to each other by half a pitch in the tire circumferential direction, and the first lug grooves of one pattern of a pair of patterns and the second lug grooves of the other pattern of the pair of patterns merge with each other in a straight-line shape so as to cross the tire equatorial plane. one of the pairs of second inclined portions, one of the first lug grooves and one of the pairs of second lug grooves merge with one of the first inclined portions, characterized in that a pattern, formed by the zigzag circumferential direction groove, the first lug grooves, and the pairs of second lug grooves, comprises a pair of same patterns (A, B) that are both formed about a tire equatorial plane and that are offset with respect to each other by half a pitch in the tire circumferential direction, and the first lug grooves of one pattern of a pair of patterns and the second lug grooves of the other pattern of the pair of patterns merge with each other in a straight-line shape so as to cross the tire equatorial plane.