A pneumatic tire comprising a tread portion ; a pair of sidewall portions each extending inwardly in a tire radial direction from both end portions of the tread portion ; a bead portion formed on an inside of each of the sidewall portions in the tire radial direction; a plurality of shoulder blocks arranged in the tire circumferential direction with first pitches (P1) on at least one of the end portions of the tread portion ; a plurality of side protectors protruding outwardly in a tire axial direction on at least one of the sidewall portions which is located on a side of the shoulder blocks ; a recessed portion between a pair of side protectors adjacent in the tire circumferential direction;and each of the side protectors being provided with at least one first groove extending inwardly in the tire radial direction from a side of the tread portion and terminating within the side protector and at least one second groove extending outwardly in the tire radial direction from a side of the bead portion and terminating within the side protector , wherein the shoulder blocks are divided by shoulder lateral grooves , the shoulder blocks and the side protectors are separated by a side narrow groove extending in the tire circumferential direction between the shoulder blocks and the side protectors , characterized in that the side protectors are arranged in the tire circumferential direction with second pitches (P2) larger than the first pitches (P1), the side narrow groove is connected with the shoulder lateral groove , and an opening width (W1) of the recessed portion at the side narrow groove is larger than an opening width (W2) of the shoulder lateral grooves at the side narrow groove . a tread portion ; a pair of sidewall portions each extending inwardly in a tire radial direction from both end portions of the tread portion ; a bead portion formed on an inside of each of the sidewall portions in the tire radial direction; a plurality of shoulder blocks arranged in the tire circumferential direction with first pitches (P1) on at least one of the end portions of the tread portion ; a plurality of side protectors protruding outwardly in a tire axial direction on at least one of the sidewall portions which is located on a side of the shoulder blocks ; a recessed portion between a pair of side protectors adjacent in the tire circumferential direction;and each of the side protectors being provided with at least one first groove extending inwardly in the tire radial direction from a side of the tread portion and terminating within the side protector and at least one second groove extending outwardly in the tire radial direction from a side of the bead portion and terminating within the side protector , wherein the shoulder blocks are divided by shoulder lateral grooves , the shoulder blocks and the side protectors are separated by a side narrow groove extending in the tire circumferential direction between the shoulder blocks and the side protectors , characterized in that the side protectors are arranged in the tire circumferential direction with second pitches (P2) larger than the first pitches (P1), the side narrow groove is connected with the shoulder lateral groove , and an opening width (W1) of the recessed portion at the side narrow groove is larger than an opening width (W2) of the shoulder lateral grooves at the side narrow groove . <EOS>