A tire for a two-wheeled motor vehicle in which a rotation direction when mounted on a vehicle is designated, the tire comprising: a center slant groove in the vicinity of a tire equatorial plane of a tread surface that extends toward a reverse rotation direction of the designated rotation direction while slanting from a tire equatorial plane side to a tire width direction outer side, wherein an angle (θ1) of an extension direction of the center slant groove that is formed with respect to a tire circumference direction is within a range of 3° to 10°, wherein the extension direction of the center slant groove is defined as a direction of a straight line in which outermost points (1A, 1B) of the center slant groove in the tire circumference direction are connected to each other, and at an end portion of the center slant groove in the reverse rotation direction, at least a tire width direction outer side groove edge of the center slant groove is formed into such a circular-arc-shaped portion as to have an angle (θ2) of the tire width direction outer side groove edge that is formed with respect to the tire circumference direction, the angle increasing toward the reverse rotation direction, the angle (θ2) of the tire width direction outer side groove edge of the center slant groove that is formed with respect to the tire circumference direction is larger than an angle (θ1) of a tire width direction inner side groove edge of the center slant groove, at an end portion in the reverse rotation direction, that is formed with respect to the tire circumference direction, characterised in that a groove depth of the center slant groove gradually decreases toward a groove edge of the center slant groove in the reverse rotation direction, and an end portion of the outer side slant groove at the tire width direction inner side overlaps with the center slant groove in a tire width direction, a groove depth of the outer side slant groove gradually decreases, at an end portion in the rotation direction, toward a groove edge of the outer side slant groove in the rotation direction, and, at an end portion of the outer side slant groove in the rotation direction, an angle (θ5) of a tire width direction inner side groove edge that is formed with respect to the tire circumference direction is larger than an angle (θ6) of a tire width direction outer side groove edge that is formed with respect to the tire circumference direction. a center slant groove in the vicinity of a tire equatorial plane of a tread surface that extends toward a reverse rotation direction of the designated rotation direction while slanting from a tire equatorial plane side to a tire width direction outer side, wherein an angle (θ1) of an extension direction of the center slant groove that is formed with respect to a tire circumference direction is within a range of 3° to 10°, wherein the extension direction of the center slant groove is defined as a direction of a straight line in which outermost points (1A, 1B) of the center slant groove in the tire circumference direction are connected to each other, and at an end portion of the center slant groove in the reverse rotation direction, at least a tire width direction outer side groove edge of the center slant groove is formed into such a circular-arc-shaped portion as to have an angle (θ2) of the tire width direction outer side groove edge that is formed with respect to the tire circumference direction, the angle increasing toward the reverse rotation direction, the angle (θ2) of the tire width direction outer side groove edge of the center slant groove that is formed with respect to the tire circumference direction is larger than an angle (θ1) of a tire width direction inner side groove edge of the center slant groove, at an end portion in the reverse rotation direction, that is formed with respect to the tire circumference direction, characterised in that a groove depth of the center slant groove gradually decreases toward a groove edge of the center slant groove in the reverse rotation direction, and an end portion of the outer side slant groove at the tire width direction inner side overlaps with the center slant groove in a tire width direction, a groove depth of the outer side slant groove gradually decreases, at an end portion in the rotation direction, toward a groove edge of the outer side slant groove in the rotation direction, and, at an end portion of the outer side slant groove in the rotation direction, an angle (θ5) of a tire width direction inner side groove edge that is formed with respect to the tire circumference direction is larger than an angle (θ6) of a tire width direction outer side groove edge that is formed with respect to the tire circumference direction.