A pneumatic tire comprising: a tread portion provided with a plurality of circumferentially and continuously extending main grooves to form a plurality of land portions, the tread portion comprising a designated installing direction to a vehicle to have an outboard tread edge (To) and an inboard tread edge (Ti); the main grooves comprising an outboard shoulder main groove disposed on the side of the outboard tread edge (To), an inboard shoulder main groove disposed on the side of the inboard tread edge (Ti) and a central main groove disposed between the outboard shoulder main groove and the inboard shoulder main groove; the land portions comprising an outboard central land portion between the outboard shoulder main groove and the central main groove, and an inboard central land portion between the inboard shoulder main groove and the central main groove; the outboard central land portion being provided with a plurality of first central sipes having a width of less than 2 mm, the outboard central land portion being not provided with any grooves having a width equal to or more than 2 mm; the inboard central land portion being provided with a plurality of second central sipes having a width of less than 2 mm, the inboard central land portion being not provided with any grooves having a width equal to or more than 2 mm; the first central sipes extending from the central main groove to the outboard shoulder main groove; the second central sipes extending from the central main groove to the inboard shoulder main groove, characterized in that the inboard central land portion has an axial width greater than an axial width of the outboard central land portion, and a total (W1+W2+W3) of the widths (W1, W2, W3) of the outboard shoulder main groove, the inboard shoulder main groove and the central main groove respectively is in a range of from 25% to 29% of the tread width. a tread portion provided with a plurality of circumferentially and continuously extending main grooves to form a plurality of land portions, the tread portion comprising a designated installing direction to a vehicle to have an outboard tread edge (To) and an inboard tread edge (Ti); the main grooves comprising an outboard shoulder main groove disposed on the side of the outboard tread edge (To), an inboard shoulder main groove disposed on the side of the inboard tread edge (Ti) and a central main groove disposed between the outboard shoulder main groove and the inboard shoulder main groove; the land portions comprising an outboard central land portion between the outboard shoulder main groove and the central main groove, and an inboard central land portion between the inboard shoulder main groove and the central main groove; the outboard central land portion being provided with a plurality of first central sipes having a width of less than 2 mm, the outboard central land portion being not provided with any grooves having a width equal to or more than 2 mm; the inboard central land portion being provided with a plurality of second central sipes having a width of less than 2 mm, the inboard central land portion being not provided with any grooves having a width equal to or more than 2 mm; the first central sipes extending from the central main groove to the outboard shoulder main groove; the second central sipes extending from the central main groove to the inboard shoulder main groove, characterized in that the inboard central land portion has an axial width greater than an axial width of the outboard central land portion, and a total (W1+W2+W3) of the widths (W1, W2, W3) of the outboard shoulder main groove, the inboard shoulder main groove and the central main groove respectively is in a range of from 25% to 29% of the tread width.