To provide a front frame which is mounted on all the surfaces of a game machine and has an enhanced strength by using a synthetic resin and to prevent illegal acts of opening committed from a wider glass door frame simultaneously.

Frame-shaped reinforcing ribs 10 are protruded on the upper edge and the right and left side edges of the front frame 2. The reinforcing ribs 10 increases the rigidity of the front frame 2 and prevents illegal openings by covering the glass door frame 11 and side end surfaces of a front surface board 12. The durability of a lower ball reception 18 is increased by providing a discharge passage 15 for withdrawing balls and a discharge passage 16 for foul balls adjacently while they are misaligned back and forth and avoiding the concentration of the falling balls to one point.