A pneumatic tire has a high wet performance with keeping steering stability and wear resistance. Each of the middle land portions (12) is provided with middle sipes (15) and a middle sub-groove (16). Each of the middle sipes (15) has an arc-like shape such that an angle (θ1) with respect to the circumferential direction of the tire gradually increases from its inner end (15i) towards its outer end (15o). A circumferential length (L2) is in a range of from 0.6 to 1.0 times the arrangement pitch (P2) of the middle sipe (15). The middle sub-groove (16) communicates with a shoulder main groove (10), terminates without communicating with a crown main groove (9), and has an arc-like shape having an angle (θ2) that gradually increases from its inner end (16i) to its outer end (16o). A length (L3) of the middle sub-groove (16) is less than the length (L2) of the middle sipe, and the adjacent middle sipe (15) and middle sub-groove (16) overlap one another in the axial direction of the tire.