A pneumatic tire having a tread pattern includes: shoulder lug grooves opening at ground contact edges; center lug grooves having both ends; circumferential primary grooves being formed to wave-like shape and alternately connecting the ends of the center lug grooves and inward ends of the shoulder lug grooves in the tire width direction; center blocks formed in a row defined by the center lug grooves and the pair of circumferential primary grooves; and circumferential secondary grooves being formed in regions of the center blocks and interconnecting center lug grooves adjacent in the tire circumferential direction. The circumferential secondary grooves have secondary groove turning portions, and the center lug grooves have lug groove turning portions and connect to the circumferential secondary grooves at the lug groove turning portions.