A pneumatic tire comprising: a decorative portion disposed on a tire side portion that is an outer surface of a sidewall portion; the decorative portion comprising a plurality of ridges that extend along the tire side portion, the plurality of ridges being arranged side by side in a tire circumferential direction; the plurality of ridges comprising a common form of an inclination angle in the tire circumferential direction with respect to a tire radial direction and an interval between a pair of the plurality of ridges adjacent to one another, the plurality of ridges forming a ridge group, and three or more ridge groups (50; 51... 55) are provided; and the plurality of ridges of the different ridge groups (50; 51... 55) are arranged intersecting one another, characterized in that the plurality of ridges of the same ridge group have an identical height to one another and the plurality of ridges of the different ridge groups (50; 51... 55) have different heights; and/or at least one of the ridge groups has a plurality of sizes of interval as an interval between a pair of the plurality of ridges adjacent to one another. a decorative portion disposed on a tire side portion that is an outer surface of a sidewall portion; the decorative portion comprising a plurality of ridges that extend along the tire side portion, the plurality of ridges being arranged side by side in a tire circumferential direction; the plurality of ridges comprising a common form of an inclination angle in the tire circumferential direction with respect to a tire radial direction and an interval between a pair of the plurality of ridges adjacent to one another, the plurality of ridges forming a ridge group, and three or more ridge groups (50; 51... 55) are provided; and the plurality of ridges of the different ridge groups (50; 51... 55) are arranged intersecting one another, the decorative portion comprising a plurality of ridges that extend along the tire side portion, the plurality of ridges being arranged side by side in a tire circumferential direction; the plurality of ridges comprising a common form of an inclination angle in the tire circumferential direction with respect to a tire radial direction and an interval between a pair of the plurality of ridges adjacent to one another, the plurality of ridges forming a ridge group, and three or more ridge groups (50; 51... 55) are provided; and the plurality of ridges of the different ridge groups (50; 51... 55) are arranged intersecting one another, characterized in that the plurality of ridges of the same ridge group have an identical height to one another and the plurality of ridges of the different ridge groups (50; 51... 55) have different heights; and/or at least one of the ridge groups has a plurality of sizes of interval as an interval between a pair of the plurality of ridges adjacent to one another. the plurality of ridges of the same ridge group have an identical height to one another and the plurality of ridges of the different ridge groups (50; 51... 55) have different heights; and/or at least one of the ridge groups has a plurality of sizes of interval as an interval between a pair of the plurality of ridges adjacent to one another.