A heavy duty tire 2 has a nominal aspect ratio of not greater than 70% and includes a tread 4 and a reinforcing portion 20 including a belt 34 and a band 36 including a full band 40 and a pair of edge bands 42. Each end 40e of the full band 40 is located axially outward of a shoulder circumferential groove 24s. Each edge band 42 is located radially outward of the end 40e. In a meridian cross-section, a contour line TL of a tread surface 22 includes a first contour line TL1 and a pair of second contour lines TL2. The first contour line TL1 is an arc. Each second contour line TL2 is a straight line or an arc. In the contour line TL, a boundary PB between the contour lines TL1 and TL2 is located in a portion corresponding to the shoulder circumferential groove 24s.