A magnetic golf putting training device (1) having an attachment device (10) with two arms (3a and 3b), a clamp (25) for removably attaching the attachment device (10) to a putter (2), magnets (11a and 11b) located on the arms (3a and 3b) and guiding magnets (12a and 12b). The arms (3a and 3b) are located on each end of the putter head (9) during use. The guiding magnets (12a and 12b) are positioned such that they are substantially perpendicular to the putter head (9) and such that the electromagnetic field of each guiding magnets (12a and 12b) is facing towards the like electromagnetic field of each magnet (11a and 11b) located on the arms (3a and 3b) so as to create a repelling force (28).