A pneumatic tire (10, 40) comprising: a first direction concave portion pattern (20, 50) having a main ridge region (24, 54), which has a plurality of main ridges (22A, 22B, 22C, 22D, 52A, 52B) that project out from a bottom surface (18A, 48A) of a concave portion (18, 48) formed in an outer surface of a tire side portion and that are disposed in parallel such that an extending direction thereof is a first direction, and a sub-ridge region (28, 58), which has a plurality of sub-ridges (26A, 26B, 26C, 26D 56A, 56B, 56C, 56D) that project out from the bottom surface (18A, 48A) of the concave portion (18, 48) and that are disposed in parallel such that an extending direction thereof is the first direction, a light reflection pattern of the sub-ridge region (28, 58) being different than that of the main ridge region (24, 54); and a second direction concave portion pattern (30, 60) having the main ridge region (34, 64), at which the extending direction of the main ridges (32A, 32B, 32C, 32D, 62A, 62B) is a second direction that is different than the first direction, and the sub-ridge region (38, 68), at which the extending direction of the sub-ridges (36A, 36B, 36C, 36D 66A, 66B, 66C, 66D) is the second direction that is different than the first direction, wherein a plurality of the first direction concave portion patterns (20, 50) and the second direction concave portion patterns (30, 60) are disposed at the tire side portion so as to be lined up alternately in a form of a lattice, characterized in that a plurality of the first direction concave portion patterns (20, 50) and the second direction concave portion patterns (30, 60) are disposed at the tire side portion such that the main ridge regions (24, 34, 54, 64) and the sub-ridge regions (28, 38, 58, 68) respectively extend in zigzag shapes in a direction intersecting a tire peripheral direction. a first direction concave portion pattern (20, 50) having a main ridge region (24, 54), which has a plurality of main ridges (22A, 22B, 22C, 22D, 52A, 52B) that project out from a bottom surface (18A, 48A) of a concave portion (18, 48) formed in an outer surface of a tire side portion and that are disposed in parallel such that an extending direction thereof is a first direction, and a sub-ridge region (28, 58), which has a plurality of sub-ridges (26A, 26B, 26C, 26D 56A, 56B, 56C, 56D) that project out from the bottom surface (18A, 48A) of the concave portion (18, 48) and that are disposed in parallel such that an extending direction thereof is the first direction, a light reflection pattern of the sub-ridge region (28, 58) being different than that of the main ridge region (24, 54); and a second direction concave portion pattern (30, 60) having the main ridge region (34, 64), at which the extending direction of the main ridges (32A, 32B, 32C, 32D, 62A, 62B) is a second direction that is different than the first direction, and the sub-ridge region (38, 68), at which the extending direction of the sub-ridges (36A, 36B, 36C, 36D 66A, 66B, 66C, 66D) is the second direction that is different than the first direction, wherein a plurality of the first direction concave portion patterns (20, 50) and the second direction concave portion patterns (30, 60) are disposed at the tire side portion so as to be lined up alternately in a form of a lattice, characterized in that a plurality of the first direction concave portion patterns (20, 50) and the second direction concave portion patterns (30, 60) are disposed at the tire side portion such that the main ridge regions (24, 34, 54, 64) and the sub-ridge regions (28, 38, 58, 68) respectively extend in zigzag shapes in a direction intersecting a tire peripheral direction.