A golfer classification method in which, in order to classify a golfer based on his/her swing behavior, a first head speed HS1 of a short iron when the golfer hits a golf ball with the short iron is measured; a second head speed HS2 and a blow angle of a long iron when the golfer hits a golf ball with the long iron are measured; the head speed ratio HS2/HS1 is calculated; by comparing the blow angle with a first threshold, the golfer is classified into a down blow group or a non down blow group; and by comparing the head speed ratio HS2/HS1 with a second threshold, the golfer classified into the down blow group is further classified into a first down blow group or a second down blow group. A golf club selection method in which, for the golfer classified by the golfer classification method, a suitable golf club is selected.