A retreaded tire comprising: a base tire; and a tread rubber for retread adhered to the base tire, wherein the tread rubber includes a first tread edge and a first shoulder circumferential groove adjacent to the first tread edge and extending continuously in a tire circumferential direction, and the first shoulder circumferential groove has a groove surface provided with a plurality of dimples, the first shoulder circumferential groove is connected with a plurality of first shoulder lateral grooves arranged in the tire circumferential direction and each extending in a tire axial direction on a ground contacting surface of the tread rubber, and in a 1-pitch area (Pa) between two first shoulder lateral grooves adjacent to each other, the groove surface of the first shoulder circumferential groove is provided with one or more rows each having 2 to 20 dimples arranged in the tire circumferential direction, the tread rubber includes the ground contacting surface extending axially inward from the first tread edge and a first buttress surface extending inward in a tire radial direction from the first tread edge, the tread rubber is provided with a plurality of second shoulder lateral grooves each opening at the ground contacting surface and the first buttress surface, and on the first buttress surface, each of the second shoulder lateral grooves has a groove width of 50% or less of a 1-pitch length between two second shoulder lateral grooves adjacent to each other, characterized in that wherein each of the second shoulder lateral grooves has a maximum depth of 50% or less of a maximum depth (da) of the first shoulder circumferential groove. a base tire; and a tread rubber for retread adhered to the base tire, wherein the tread rubber includes a first tread edge and a first shoulder circumferential groove adjacent to the first tread edge and extending continuously in a tire circumferential direction, and the first shoulder circumferential groove has a groove surface provided with a plurality of dimples, the first shoulder circumferential groove is connected with a plurality of first shoulder lateral grooves arranged in the tire circumferential direction and each extending in a tire axial direction on a ground contacting surface of the tread rubber, and in a 1-pitch area (Pa) between two first shoulder lateral grooves adjacent to each other, the groove surface of the first shoulder circumferential groove is provided with one or more rows each having 2 to 20 dimples arranged in the tire circumferential direction, the tread rubber includes the ground contacting surface extending axially inward from the first tread edge and a first buttress surface extending inward in a tire radial direction from the first tread edge, the tread rubber is provided with a plurality of second shoulder lateral grooves each opening at the ground contacting surface and the first buttress surface, and on the first buttress surface, each of the second shoulder lateral grooves has a groove width of 50% or less of a 1-pitch length between two second shoulder lateral grooves adjacent to each other, characterized in that wherein each of the second shoulder lateral grooves has a maximum depth of 50% or less of a maximum depth (da) of the first shoulder circumferential groove.