A pneumatic tire comprising: a tread portion provided with a plurality of shoulder lateral grooves extending axially outwardly to the tread edge (Te) and then radially inwardly from the tread edge (Te), and a plurality of shoulder blocks divided by the shoulder lateral grooves, wherein each of the shoulder blocks has a side surface extending radially inwardly from the tread edge (Te), the side surface includes a first surface section and a second surface section which are arranged in the circumferential direction of the tire, and protrude more outwardly of the tire than the groove bottom surfaces of the shoulder lateral grooves, in a tire meridian section including the first surface section, the profile line of the first surface section extends from the tread edge (Te) to a position corresponding to a position of the radial inner ends of the shoulder lateral grooves, and in a tire meridian section including the second surface section, the profile line of the second surface section extends from the tread edge (Te) to a position corresponding to the above-said position of the radial inner ends of the shoulder lateral grooves through a path more inwardly of the tire than that of the profile line of the first surface section, characterized in that each of the shoulder lateral grooves comprises a main portion extending axially outwardly at least to a position corresponding to the tread edge (Te), and a secondary portion extending radially inwardly from the main portion while inclining toward one side in the tire circumferential direction at an angle θ with respect to the main portion through between the adjacent shoulder blocks, wherein the angle θ is in a range from 20 to 45 degrees. a tread portion provided with a plurality of shoulder lateral grooves extending axially outwardly to the tread edge (Te) and then radially inwardly from the tread edge (Te), and a plurality of shoulder blocks divided by the shoulder lateral grooves, wherein each of the shoulder blocks has a side surface extending radially inwardly from the tread edge (Te), the side surface includes a first surface section and a second surface section which are arranged in the circumferential direction of the tire, and protrude more outwardly of the tire than the groove bottom surfaces of the shoulder lateral grooves, in a tire meridian section including the first surface section, the profile line of the first surface section extends from the tread edge (Te) to a position corresponding to a position of the radial inner ends of the shoulder lateral grooves, and in a tire meridian section including the second surface section, the profile line of the second surface section extends from the tread edge (Te) to a position corresponding to the above-said position of the radial inner ends of the shoulder lateral grooves through a path more inwardly of the tire than that of the profile line of the first surface section, characterized in that each of the shoulder lateral grooves comprises a main portion extending axially outwardly at least to a position corresponding to the tread edge (Te), and each of the shoulder lateral grooves comprises a main portion extending axially outwardly at least to a position corresponding to the tread edge (Te), and a secondary portion extending radially inwardly from the main portion while inclining toward one side in the tire circumferential direction at an angle θ with respect to the main portion through between the adjacent shoulder blocks, wherein the angle θ is in a range from 20 to 45 degrees.