Abstract: A putter having a shaft and a lightweight club head, with a low center of gravity. The club head has the shape of a U seen from above having two side portions forming the legs and a central portion connecting the side portions defining a ball striking surface. The club head has a weight of 140 to 230 grams, such as 160 to 220 grams, for example about 200 grams. The center of gravity is positioned a distance above the lowest point of the club head, 2 to 12 mm, preferably 3 to 8 mm, for example about 4 mm. The shaft is attached to the club head with an angle (?) in a direction forward along the target line as seen from the club head and upwards. Angle (?) is 2° to 10°, preferably 3° to 8°, for example 4° or 5°.