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The purpose of this study were to describe and compare the selected electromyographical muscle activities of trunk during Pro-golfer's drive swing. Using surface electrode electromyography, we evaluated muscle activity in 6 male professional golfers during the golf drive swing. Surface electrodes were used to record the level of muscle activity in the right abdominal oblique, left abdominal oblique, right erector spinae, left erector spinae, right rectus abdominis, left rectus abdominis, right gluteus maximus, left gluteus maximus muscles during the golfer's swing These signals were compared with %RVC(Reference voluntary contraction) which was normalized by IEMG(Integrated EMG). The golf swing was divided into three phases: take away, forward swing-acceleration, follow-through. we observed patterns of trunk muscle activity throughout three phases of the golf swing The results can be summarized as follows: LAO(Left abdominal oblique), LES(Left erector spinae), RES(Right erector spinae) and LGM(Left gluteus maximus) had statistically significant difference in take away phase, LAO(Left abdominal oblique), RAO(Right abdominal oblique) and RES(Right erector spinae) had statistically significant difference in forward swing-acceleration phase, LRA(Left rectus abdominis) had statistically significant difference in follow-through phase.