A tread pattern of a pneumatic tire includes one center continuous land portion and two intermediate continuous land portions that are divided by four circumferential main grooves and that are not provided with lug grooves. Edges on both sides of one center main groove include groove chamfered portions having a chamfered width changing in the circumferential direction in a zigzag shape. In the regions of the intermediate continuous land portions, first sipes extending inward in the lateral direction from shoulder main grooves of the main grooves, which are positioned on outer sides in the lateral direction, are provided. The first sipes each include a sipe main body portion having a constant distance between sipe wall surfaces on a sipe bottom side and a sipe chamfered portion inclined so that the sipe wall surfaces are open toward the tread surface.