Auxiliary apparatus for golf putter

An auxiliary apparatus for a golf putter, comprising:

• a coupling member detachably coupled to a shaft of the golf putter;
• and
• a guide light emitting device coupled to the coupling member and configured to emit a guide light to help golf putting,
• wherein the coupling member includes:
• a first coupling member opened at upper and lower portions and one side thereof and detachably coupled to the golf putter through the opened space;
• and
• a second coupling member extending from the first coupling member and opened at upper and lower portions thereof, the second coupling member being configured to accommodate the guide light emitting device through the opened space,
• wherein the guide light emitting device includes:
• a housing;
• a battery located at one side inside the housing and configured to supply a power for operating the guide light emitting device;
• a light emitting unit configured to emit a guide light based on the supplied power;
• and
• a control unit configured to select a light emitting mode and control the light emitting unit so that the guide light is emitted to correspond to the light emitting mode,
• wherein the guide light emitting device is detachably coupled in the opened space formed in the second coupling member and has a cylindrical shape elongated vertically, and the guide light emitting device is inserted into the second coupling member to be rotatable therein.