Abstract: A putter alignment device is disclosed and includes a mounting frame for engaging a putter and for aligning the device relative to the putter face. A mirror frame having a mirror, employing a novel indicating line, supported thereby is coupled pivotally to the mounting frame for aligning the putter relative to a target. A securing arrangement is adapted to engage the mounting frame at a portion thereof, extend behind the putter, and engage another portion of the mounting frame to attach removably the putter alignment device on the putter. Inventive sight members facilitate positioning of the eyes of the golfer relative to the target line as a part of the alignment method.