A motorcycle pneumatic tire, wherein: in a reference state where the tire is mounted to an applicable rim, filled with a prescribed internal pressure without load applied, when tire widthwise regions on a tread surface partitioned by tire widthwise positions on the tread surface spaced, from a tire equatorial plane to tread edge sides, by 50% of a half width (Lp) of a peripheral length of the tread surface along a periphery of the tread surface, and tire widthwise positions on the tread surface spaced, from a tire equatorial plane to tread edge sides, by 82% of the half width (Lp) are defined as intermediate regions, the intermediate regions on both tire half portions respectively have recesses (21, 22a, 22b, 31, 41) intermittent along a tire circumferential direction, a negative ratio in the intermediate regions is 15% or more and 45% or less, characterized in that the recesses (21, 22a, 22b, 31, 41) comprise on both tire half portions respectively: first grooves (21, 31) or small holes intermittent along a tire circumferential direction, which are formed only in the intermediate regions, said small holes being holes with a diameter within a range of 10 mm or more and 20 mm or less; and lug grooves, comprising first lug grooves and second lug grooves alternately formed in the tire circumferential direction, both ends of each of the first and second lug grooves (22a, 22b) terminating within the tread surface, the first lug grooves extending in a manner inclined with respect to the tire width direction with respectively one bent position in the vicinity of their centers in the extension direction, the second lug groove being composed of a first groove portion extending in a manner inclined with respect to the tire width direction with two bent positions in the vicinity of their centers, and a second groove portion being connected to the first groove portion and extending in a different direction from the first groove portion, wherein the first and second lug grooves (22a, 22b) are grooves with a groove depth larger than the first grooves (21, 31) or small holes. in a reference state where the tire is mounted to an applicable rim, filled with a prescribed internal pressure without load applied, when tire widthwise regions on a tread surface partitioned by tire widthwise positions on the tread surface spaced, from a tire equatorial plane to tread edge sides, by 50% of a half width (Lp) of a peripheral length of the tread surface along a periphery of the tread surface, and tire widthwise positions on the tread surface spaced, from a tire equatorial plane to tread edge sides, by 82% of the half width (Lp) are defined as intermediate regions, the intermediate regions on both tire half portions respectively have recesses (21, 22a, 22b, 31, 41) intermittent along a tire circumferential direction, a negative ratio in the intermediate regions is 15% or more and 45% or less, characterized in that the intermediate regions on both tire half portions respectively have recesses (21, 22a, 22b, 31, 41) intermittent along a tire circumferential direction, a negative ratio in the intermediate regions is 15% or more and 45% or less, characterized in that the recesses (21, 22a, 22b, 31, 41) comprise on both tire half portions respectively: first grooves (21, 31) or small holes intermittent along a tire circumferential direction, which are formed only in the intermediate regions, said small holes being holes with a diameter within a range of 10 mm or more and 20 mm or less; and lug grooves, comprising first lug grooves and second lug grooves alternately formed in the tire circumferential direction, both ends of each of the first and second lug grooves (22a, 22b) terminating within the tread surface, the first lug grooves extending in a manner inclined with respect to the tire width direction with respectively one bent position in the vicinity of their centers in the extension direction, the second lug groove being composed of a first groove portion extending in a manner inclined with respect to the tire width direction with two bent positions in the vicinity of their centers, and a second groove portion being connected to the first groove portion and extending in a different direction from the first groove portion, wherein the first and second lug grooves (22a, 22b) are grooves with a groove depth larger than the first grooves (21, 31) or small holes. first grooves (21, 31) or small holes intermittent along a tire circumferential direction, which are formed only in the intermediate regions, said small holes being holes with a diameter within a range of 10 mm or more and 20 mm or less; and lug grooves, comprising first lug grooves and second lug grooves alternately formed in the tire circumferential direction, both ends of each of the first and second lug grooves (22a, 22b) terminating within the tread surface, the first lug grooves extending in a manner inclined with respect to the tire width direction with respectively one bent position in the vicinity of their centers in the extension direction, the second lug groove being composed of a first groove portion extending in a manner inclined with respect to the tire width direction with two bent positions in the vicinity of their centers, and a second groove portion being connected to the first groove portion and extending in a different direction from the first groove portion, wherein the first and second lug grooves (22a, 22b) are grooves with a groove depth larger than the first grooves (21, 31) or small holes.