A putter head comprising a body having an open, frame-like structure having an improved mass distribution for optimizing the moment of inertia and placement of the center of gravity. The body includes a front portion, a rear portion, toe and heel portions extending between and interconnecting respective ends of the front and rear portions, and a central portion interconnecting the front and rear portions along the longitudinal axis of the body. A first main opening of the body is bounded by the toe portion, the central portion, and part of the front portion. A second main opening of the body is bounded by the heel portion, the central portion, and part of the front portion. The heel and toe portions desirably are formed with respective elongated openings extending substantially the entire lengths of the heel and toe portions.