A pneumatic tire comprising: a tread portion comprising at least three circumferential main grooves extending in a tire circumferential direction, at least four land regions divided by the circumferential main grooves and including a pair of shoulder land regions disposed on outermost sides in a tire axial direction, the shoulder land regions being provided with a plurality of shoulder lateral grooves extending laterally; the circumferential main grooves having a groove depth (Hg) not greater than 6.3 mm; characterised in that the shoulder lateral grooves have deepest portions with a maximum groove depth at axially inner end portions thereof, a groove depth (Hymax) of the deepest portions being in a range of from 75% to 90% of the groove depth (Hg) of the circumferential main grooves and a groove depth (Hye) of the shoulder lateral grooves at a tread ground contacting edge (Te) being in a range of from 63% to 85% of the groove depth (Hg); when a tread surface is divided into a pair of shoulder regions (Ys) located axially outside and a crown region (Yc) located therebetween by a pair of the circumferential main grooves disposed on the axially outermost sides, the shoulder regions (Ys) have a land ratio (Ls) being a ratio of a virtual ground contacting area of the tread portion having no groove and an actual ground contacting area of the tread portion having the grooves, which is smaller than a land ratio (Lc) of the crown region (Yc); and the tread surface is formed of a tread rubber in which a ratio tanδ0/tanδ30 between tanδ0 at 0 degree Celsius and tanδ30 at 30 degrees Celsius is not less than 3.75. a tread portion comprising at least three circumferential main grooves extending in a tire circumferential direction, at least four land regions divided by the circumferential main grooves and including a pair of shoulder land regions disposed on outermost sides in a tire axial direction, the shoulder land regions being provided with a plurality of shoulder lateral grooves extending laterally; the circumferential main grooves having a groove depth (Hg) not greater than 6.3 mm; characterised in that the shoulder lateral grooves have deepest portions with a maximum groove depth at axially inner end portions thereof, a groove depth (Hymax) of the deepest portions being in a range of from 75% to 90% of the groove depth (Hg) of the circumferential main grooves and a groove depth (Hye) of the shoulder lateral grooves at a tread ground contacting edge (Te) being in a range of from 63% to 85% of the groove depth (Hg); when a tread surface is divided into a pair of shoulder regions (Ys) located axially outside and a crown region (Yc) located therebetween by a pair of the circumferential main grooves disposed on the axially outermost sides, the shoulder regions (Ys) have a land ratio (Ls) being a ratio of a virtual ground contacting area of the tread portion having no groove and an actual ground contacting area of the tread portion having the grooves, which is smaller than a land ratio (Lc) of the crown region (Yc); and the tread surface is formed of a tread rubber in which a ratio tanδ0/tanδ30 between tanδ0 at 0 degree Celsius and tanδ30 at 30 degrees Celsius is not less than 3.75.