of cracks originating from the recessed portions 100 further since the distance d between the deepest portion 150 of the recessed portion 100 and the grounding end 50 e of the tread 50 varies in the tire circumferential direction d c curvature itself is suppressed and generation of cracks is suppressed further even when cracks are generated progression of cracks is suppressed in the present embodiment the first outer edge 110 and the second outer edge 120 are in an arc like shape and the deepest portion 150 is curved in the pneumatic tire 10 further the recessed portion 100 has a first bottom surface 130 that extends from the first outer edge 110 to the deepest portion 150 and a second bottom surface 140 that extends from the second outer edge 120 to the deepest portion 150 thus progression of cracks resulting from the shape of the recessed portion 100 along the tire circumferential direction d c is further suppressed in the present embodiment the deepest portion 150 has the first curved portion 151 that is curved so as to be closer to the first outer edge 110 and the second curved portion 152 that continues to the first curved portion 151 and is curved so as to be closer to the second outer edge 120 further the first bottom surface 130 is formed so as to be point symmetrical to the second bottom surface 140 therefore progression of cracks in the recessed portion 100 can be suppressed in the present embodiment the first recessed row 210 and the.