The purpose of this study. was to analyze the helicopter throw motion and patterns in bowling and present its correct method according to its characteristics. For this purpose, the throw motion of helicopter bending among national athletes and representative reservist athletes was videotaped with the camcorder and analyzed. To make a more accurate analysis of motion, the reflection marker was attached to the joint of the upper limbs and the DLT technique was used on the 3-dimensional coordinate. As a result, the following conclusion was drawn: The time required in the follow throw section in the helicopter throw motion was found to be Shorter than that of the down-swing section. The required time of the downswing section was characterized by being longer than that of the hook ball throw motion The height of the center of the human body showed the tendency to become lower from the Event 1 in which the left leg was easy to the Event 3 in which it was released but showed the tendency to become higher at the end of follow throw than at the point of projection. This was because the ball was projected from the max. lowest place to maintain the close relationship to the lane when projecting the ball. The forward leaning angle of the upper body in the helicopter throw motion was shown to be smaller at the start position but as the throw motion progressed the upper body bent forward and stand upright when somewhat releasing the ball and bent forward again after the hall left the hand and released. The phenomenon of the trunk standing upright at the point of release was found to be because the upper body exerted an compensatory action on the weight of the ball when projecting the ball. At the time of the helicopter throw motion it was found that the angle of the shoulder joint was large to control inward rotation and the ball on the lane and the upper arm was released at the forward position than at the vertical position and the elbow angel released at the somewhat bent state.