A middle land portion is divided into multiple middle blocks by first middle transverse grooves and second middle transverse grooves arranged alternately in the tire circumference direction. The first middle transverse grooves include a first groove portion which communicates with a crown main groove, and a second groove portion which communicates with a shoulder main groove and is less wide than the first groove portion; the second middle transverse grooves include a third groove portion) which communicates with the shoulder main groove, and a fourth groove portion which communicates with a crown main groove and is less wide than the third groove portion. The middle land portion has first middle slots which are disposed near a second groove portion, extend from the shoulder main groove towards the crown main groove and end within the middle land portion, and second middle slots which are disposed near fourth groove portions, extend from the crown main groove towards the shoulder main groove and end within the middle land portion.