A pneumatic tire comprising a tread portion having a tire equator, the tread portion being provided with: a pair of circumferentially and continuously extending crown main grooves disposed axially both sides of the tire equator; a pair of circumferentially and continuously extending shoulder main grooves disposed axially outside of the crown main grooves; a pair of middle portions each of which is between the crown main groove and the shoulder main groove; and a pair of shoulder portions each of which is disposed axially outward of each shoulder main groove, the tread portion having a contact surface being covered with a cap rubber layer which is made of rubber having a loss tangent in a range of from 0.03 to 0.18, the middle portions being provided with a plurality of middle lug grooves having groove widths in a range of not more than 2 mm, each middle lug groove extending from one end connected either the crown main groove or the shoulder main groove to the other end terminating within the middle portion,and each shoulder portion being provided with a plurality of first shoulder lateral grooves having axially inner ends connected to the shoulder main groove, wherein said first shoulder lateral grooves consist of grooves having groove widths in a range of not more than 2 mm, characterized in that the middle portions are provided with only the plurality of middle lug grooves, the middle lug grooves have an angle (θ1) in a range of from 40 to 55 degrees with respect to a circumferential direction of the tire, and the tread portion has a land ratio Sa/Sb in a range of from 0.65 to 0.75, wherein "Sa" is a net footprint area of the contact surface of the tread portion, and "Sb" is a gross footprint area including both the contact surface and whole grooves of the tread portion. a pair of circumferentially and continuously extending crown main grooves disposed axially both sides of the tire equator; a pair of circumferentially and continuously extending shoulder main grooves disposed axially outside of the crown main grooves; a pair of middle portions each of which is between the crown main groove and the shoulder main groove; and a pair of shoulder portions each of which is disposed axially outward of each shoulder main groove, the tread portion having a contact surface being covered with a cap rubber layer which is made of rubber having a loss tangent in a range of from 0.03 to 0.18, the middle portions being provided with a plurality of middle lug grooves having groove widths in a range of not more than 2 mm, each middle lug groove extending from one end connected either the crown main groove or the shoulder main groove to the other end terminating within the middle portion,and each shoulder portion being provided with a plurality of first shoulder lateral grooves having axially inner ends connected to the shoulder main groove, wherein said first shoulder lateral grooves consist of grooves having groove widths in a range of not more than 2 mm, characterized in that the middle portions are provided with only the plurality of middle lug grooves, the middle lug grooves have an angle (θ1) in a range of from 40 to 55 degrees with respect to a circumferential direction of the tire, and the tread portion has a land ratio Sa/Sb in a range of from 0.65 to 0.75, wherein "Sa" is a net footprint area of the contact surface of the tread portion, and "Sb" is a gross footprint area including both the contact surface and whole grooves of the tread portion.