Ball marker for golf

A ball marker for golf comprising:

• a round-shaped case having an opening;
• a disc spring fit to the round-shaped case;
• a thin film printed circuit board and a flexible printed circuit cable seated on a top surface of the disc spring exposed to an upper portion of the round-shaped case, the thin film printed circuit board having a light-emitting diode flickering control chip, the flexible printed circuit cable being connected to the thin film printed circuit board and having a plurality of surface mounted device light emission diodes;
• a transparent rubber layer hardened and formed on the thin film printed circuit board and the flexible printed circuit cable;
• an electric cell received in a receiving portion of the disc spring exposed from a lower portion of the round-shaped case;
• a button switch and a button cover laminatedly arranged on the electric cell;
• and
• a lower fixing portion comprising soft resin fused and fixed onto the disc spring.