To provide an attachment structure of a hitting controller capable of improving the efficiency of the maintenance work of a ball hitting drive part or the like.

On the back side of an inner frame 12, a ball hitting drive part 22 for hitting game balls toward the board surface of a game board is disposed, and a hitting controller 41 for controlling the ball hitting drive part 22 through a hinge mechanism 36 is pivoted. By turning the hitting controller 41, the hook member 47 of the hitting controller 41 and the lower end edge part of a mechanism set board 19 disposed on the back side of the inner frame 12 are engaged, and the hitting controller 41 is fixed to the inner frame 12 in a closed state. The hinge mechanism 36 is constituted of a shaft part 28c which is formed on a first support piece 28b provided on the inner frame 12 and extended upwards, and a hole part 45a which is formed on a second support piece 45 provided on the side part of the hitting controller 41 and piercing through vertically and to which the shaft part 28c can be inserted. Then, by inserting the shaft part 28c to the hole part 45a and pivoting it thereon, the rear part of the ball hitting drive part 22 is covered when the hitting controller 41 is closed.