A tire comprising a tread portion, wherein the tread portion is provided with a sipe, characterized in that the sipe comprises a portion in which a plurality of repeat units are connected in series in the length direction of the sipe, each of the repeat units is bent so that four sipe segments form acute angles with each other, said four sipe segments include a first sipe segment extending in a tire axial direction at an angle of +/- 5 degrees with respect to the tire axial direction, a second sipe segment extending from an end in a first tire axial direction of the first sipe segment toward a first tire circumferential direction (a), a third sipe segment extending in the first tire axial direction from the second sipe segment at an angle of +/- 5 degrees with respect to the tire axial direction, and a fourth sipe segment connected to the third sipe segment and extending from the third sipe segment toward a second tire circumferential direction (b) opposite to the first tire circumferential direction (a), the length of the fourth sipe segment being larger than the length of the second sipe segment, and at least one of the first sipe segment and the third sipe segment comprises, in the cross section orthogonal to the length direction, an oscillated portion which extends in a tire radial direction, while oscillating in a lateral direction orthogonal to said length direction. the tread portion is provided with a sipe, characterized in that the sipe comprises a portion in which a plurality of repeat units are connected in series in the length direction of the sipe, each of the repeat units is bent so that four sipe segments form acute angles with each other, said four sipe segments include a first sipe segment extending in a tire axial direction at an angle of +/- 5 degrees with respect to the tire axial direction, a second sipe segment extending from an end in a first tire axial direction of the first sipe segment toward a first tire circumferential direction (a), a third sipe segment extending in the first tire axial direction from the second sipe segment at an angle of +/- 5 degrees with respect to the tire axial direction, and a fourth sipe segment connected to the third sipe segment and extending from the third sipe segment toward a second tire circumferential direction (b) opposite to the first tire circumferential direction (a), the length of the fourth sipe segment being larger than the length of the second sipe segment, and a first sipe segment extending in a tire axial direction at an angle of +/- 5 degrees with respect to the tire axial direction, a second sipe segment extending from an end in a first tire axial direction of the first sipe segment toward a first tire circumferential direction (a), a third sipe segment extending in the first tire axial direction from the second sipe segment at an angle of +/- 5 degrees with respect to the tire axial direction, and a fourth sipe segment connected to the third sipe segment and extending from the third sipe segment toward a second tire circumferential direction (b) opposite to the first tire circumferential direction (a), the length of the fourth sipe segment being larger than the length of the second sipe segment, and at least one of the first sipe segment and the third sipe segment comprises, in the cross section orthogonal to the length direction, an oscillated portion which extends in a tire radial direction, while oscillating in a lateral direction orthogonal to said length direction.