A non-pneumatic tire comprising: an outer annular portion having an outer periphery including a tread provided thereon; an inner annular portion provided inside the outer annular portion; and a plurality of link parts that each connect the outer annular portion and the inner annular portion, and are provided along a tire circumferential direction, wherein the plurality of link parts include first link parts and second link parts that are alternately provided along the tire circumferential direction, the first link parts each extending from one side in a tire width direction of the outer annular portion toward one other side in the tire width direction of the inner annular portion, the second link parts each extending from the other side in the tire width direction of the outer annular portion toward the one side in the tire width direction of the inner annular portion, wherein the plurality of link parts each have a thickness in the tire circumferential direction which decreases continuously from the outer annular portion toward the inner annular portion, wherein the plurality of link parts each have a first connecting portion with the outer annular portion and a second connecting portion with the inner annular portion, wherein in the second connecting portion the width of each link part decreases from a contact end of each of the link parts with the inner annular portion to a radial outer end of the second connecting portion, wherein in the first connecting portion the width of each link part decreases from a contact end of each of the link parts with the outer annular portion to a radial inner end of the first connecting portion, wherein the width (Wt) of each of the plurality of link parts is constant from a position which is half of the tire cross-sectional height up to the radial inner end of the first connecting portion, characterized in that a width (Wr) of each of the plurality of link parts increases from a position which is half of the tire cross-sectional height up to the radial outer end of the second connecting portion. an outer annular portion having an outer periphery including a tread provided thereon; an inner annular portion provided inside the outer annular portion; and a plurality of link parts that each connect the outer annular portion and the inner annular portion, and are provided along a tire circumferential direction, wherein the plurality of link parts include first link parts and second link parts that are alternately provided along the tire circumferential direction, the first link parts each extending from one side in a tire width direction of the outer annular portion toward one other side in the tire width direction of the inner annular portion, the second link parts each extending from the other side in the tire width direction of the outer annular portion toward the one side in the tire width direction of the inner annular portion, wherein the plurality of link parts each have a thickness in the tire circumferential direction which decreases continuously from the outer annular portion toward the inner annular portion, wherein the plurality of link parts each have a first connecting portion with the outer annular portion and a second connecting portion with the inner annular portion, wherein in the second connecting portion the width of each link part decreases from a contact end of each of the link parts with the inner annular portion to a radial outer end of the second connecting portion, wherein in the first connecting portion the width of each link part decreases from a contact end of each of the link parts with the outer annular portion to a radial inner end of the first connecting portion, wherein the width (Wt) of each of the plurality of link parts is constant from a position which is half of the tire cross-sectional height up to the radial inner end of the first connecting portion, characterized in that a width (Wr) of each of the plurality of link parts increases from a position which is half of the tire cross-sectional height up to the radial outer end of the second connecting portion.