Golf ball

A golf ball comprising:

• a core having a diameter of not less than 35 mm,
• a mid layer outside the core, and
• a cover outside the mid layer, wherein
• a Shore D hardness Hm of the mid layer is larger than a Shore D hardness Hc of the cover,
• in a graph on which distances (mm) of and Shore C hardnesses at a central point of the core Ho, a first point whose distance from the central point is 2.5 mm, a second point whose distance from the central point is 5.0 mm, a third point whose distance from the central point is 7.5 mm, a fourth point whose distance from the central point is 10.0 mm, a fifth point whose distance from the central point is 12.5 mm, a sixth point whose distance from the central point is 15.0 mm, and a point on a surface of the core Hs, are plotted,
• a slope A1 of a straight line connecting the central point and the first point is not less than 1.00, and
• a maximum value Amax of absolute values of the following slopes A2 to A7 is not greater than 0.90,
• A2:
• a slope of a straight line connecting the first point and the second point,
• A3:
• a slope of a straight line connecting the second point and the third point,
• A4:
• a slope of a straight line connecting the third point and the fourth point,
• A5:
• a slope of a straight line connecting the fourth point and the fifth point,
• A6:
• a slope of a straight line connecting the fifth point and the sixth point, and
• A7:
• a slope of a straight line connecting the sixth point and the point on the surface.