A tire (1, 2, 2X, 3, 4, 5) having a circumferential recessed portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000) formed at an outer surface of a tire side portion, the circumferential recessed portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000) being recessed inward in a tread width direction and extends in a tire circumferential direction, characterized in that the circumferential recessed portioned portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000) is provided with: a first block (110, 210, 210X, 310, 410, 510, 610, 710, 810, 910, 1010) having a radial direction-outer end portion positioned at an outer side in a tire radial direction from a center in the tire radial direction in the circumferential recessed portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000), and a radial direction-inner front end portion (110a, 210a, 210Xa, 310a, 410a, 510a, 610a, 710a, 810a, 910a, 1010a) positioned at an inner side in the tire radial direction from the radial direction-outer end portion, and is protruded outward in the tread width direction; and a second block (120, 220, 220X, 320, 420, 520, 620, 720, 820, 920, 1020) having a radial direction-inner end portion positioned at the inner side in the tire radial direction from the center in the tire radial direction in the circumferential recessed portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000), and a radial direction-outer front end portion (120a, 220a, 220Xa, 320a, 420a, 520a, 620a, 720a, 820a, 920a, 1020a) positioned at the outer side in the tire radial direction from the radial direction-inner end portion, and is protruded outward in the tread width direction, and the radial direction-inner front end portion (110a, 210a, 210Xa, 310a, 410a, 510a, 610a, 710a, 810a, 910a, 1010a) of the first block (110, 210, 210X, 310, 410, 510, 610, 710, 810, 910, 1010), and the radial direction-outer front end portion (120a, 220a, 220Xa, 320a, 420a, 520a, 620a, 720a, 820a, 920a, 1020a) of the second block (120, 220, 220X, 320, 420, 520, 620, 720, 820, 920, 1020) are separated in the tire circumferential direction or the tire radial direction. a first block (110, 210, 210X, 310, 410, 510, 610, 710, 810, 910, 1010) having a radial direction-outer end portion positioned at an outer side in a tire radial direction from a center in the tire radial direction in the circumferential recessed portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000), and a radial direction-inner front end portion (110a, 210a, 210Xa, 310a, 410a, 510a, 610a, 710a, 810a, 910a, 1010a) positioned at an inner side in the tire radial direction from the radial direction-outer end portion, and is protruded outward in the tread width direction; and a second block (120, 220, 220X, 320, 420, 520, 620, 720, 820, 920, 1020) having a radial direction-inner end portion positioned at the inner side in the tire radial direction from the center in the tire radial direction in the circumferential recessed portion (100, 200, 200X, 300, 400, 500, 600, 900, 1000), and a radial direction-outer front end portion (120a, 220a, 220Xa, 320a, 420a, 520a, 620a, 720a, 820a, 920a, 1020a) positioned at the outer side in the tire radial direction from the radial direction-inner end portion, and is protruded outward in the tread width direction, and