Abstract: A knockdown indoor golf training course, which includes a teeing ground unit having a ball return gutter for guiding a golf ball back to a ball chamber and an elongated strip mechanism for guiding a golf ball to roll down to the ball chamber through the ball return gutter, and a counting net unit foldably mounted on the back side of the teeing ground unit to incorporate with a nested holder through several wire channels which extend from the various holes made on the net for counting the score and identifying the hole on the net a golf ball is driven in.