BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembly view of a golf putter head according to an embodiment of the invention; FIGS. 2A and 2B are a plan view and a sectional view of a body frame; FIG. 3 is a bottom plan view of the body frame excluding a sole; and FIGS. 4A and 4B are a plan view and a sectional view of the golf putter head according to the embodiment of the invention.