A tire (10; 10A; 10B; 10C; 10D; 10E; 10F; 10J; 10K) provided with a plurality of land portions (30, 40; 31, 41, 42) formed by a main groove (21; 21a, 21b) extending along a tire circumferential direction, wherein the land portions (30, 40; 31, 41, 42) include a first land portion (30; 31) having a first groove wall forming one wall surface of the main groove (21; 21a, 21b), and a second land portion (40; 41, 42) having a second groove wall forming the other wall surface of the main groove (21; 21a, 21b), the main groove (21; 21a, 21b) is formed with one intra-groove (100; 100a, 100b; 1100; 1100a, 1100b) recessed in a tire inner direction from a surface of the main groove (21; 21a, 21b), the intra-groove (100; 100a, 100b; 1100; 1100a, 1100b) being extended along the tire circumferential direction, characterized in that: the intra-groove (100; 100a, 100b; 1100; 1100a, 1100b) comprises: a first circumferential groove portion (110; 110A; 1110) extending along the tire circumferential direction on the first groove wall; a first inclined portion (130; 1130) extending from the first groove wall toward the second groove wall on a groove bottom of the main groove (21; 21a, 21b), the first inclined portion (130; 1130) being inclined with respect to the tire circumferential direction; a second circumferential groove portion (120; 1120) extending along the tire circumferential direction on the second groove wall; and a second inclined portion (140; 140A; 1140) extending from the second groove wall toward the first groove wall on the groove bottom of the main groove (21; 21a, 21b), the second inclined portion (140; 140A; 1140) being inclined with respect to the tire circumferential direction, a groove width of the first circumferential groove portion (110; 110A; 1110) and a groove width of the second circumferential groove portion (120; 1120) are different from a groove width of a first inclined portion (130; 1130) and a groove width of a second inclined portion (140; 140A; 1140), and the first circumferential groove portion (110; 110A; 1110), the first inclined portion (130; 1130), the second circumferential groove portion (120; 1120), and the second inclined portion (140; 140A; 1140) are formed repeatedly along the tire circumferential direction. a first circumferential groove portion (110; 110A; 1110) extending along the tire circumferential direction on the first groove wall; a first inclined portion (130; 1130) extending from the first groove wall toward the second groove wall on a groove bottom of the main groove (21; 21a, 21b), the first inclined portion (130; 1130) being inclined with respect to the tire circumferential direction; a second circumferential groove portion (120; 1120) extending along the tire circumferential direction on the second groove wall; and a second inclined portion (140; 140A; 1140) extending from the second groove wall toward the first groove wall on the groove bottom of the main groove (21; 21a, 21b), the second inclined portion (140; 140A; 1140) being inclined with respect to the tire circumferential direction, a groove width of the first circumferential groove portion (110; 110A; 1110) and a groove width of the second circumferential groove portion (120; 1120) are different from a groove width of a first inclined portion (130; 1130) and a groove width of a second inclined portion (140; 140A; 1140), and the first circumferential groove portion (110; 110A; 1110), the first inclined portion (130; 1130), the second circumferential groove portion (120; 1120), and the second inclined portion (140; 140A; 1140) are formed repeatedly along the tire circumferential direction.