Purpose In the case of spas 디c dysarthria patients, their posture because asymmetrical due 10 excessive muscle tension, and an unstable breathing pattern becomes visible for this reason. The purpose of this study measured and compared the effects of trunk realignment and Proprioceptive Neuromuscular Facilitation (PNF) on the maximum phonation time and intensity in phonation of spastic dysarthria patients. Methods Trunk realignment was based on Bobath treatment, using PNF for respira디on exercises. Patients were manually σeated considering inspiration and expiration. A laptop computer and a headset with a microphone were used 10 measure the change of maximum phonation time in order to determent the irnprovement in phonation, and the speech ana1ysis program Praat (ver. 5329) was insta11ed into the computer for evaluation to achieve a more 。이 ective date presentation. Each test subjects went through a total of 26 sessions which lasted 30 rninutes for 5 days a week, the sessions were divided into the preliminary stage (3 sessions), the treatment stage (20 sessions), and the post treatmen1 stage (3 sessions).The collected data compared and analyzed the change of phona on intensity and maximum phonaon time through visual graphs and average value of the desc. adaptive statistics. Results First, respiration on exercise with trunk realignment and PNF was measured by Praat, a speech analysis program, and found out its effect on increasing the maximum phonation time in the patients with spastic dysarthria. Second, respiration exercise with trunk realignment and PNF was measured by Praat, a speech analysis program, and found out its effect on increasing the phonation intensity in the patients with spas 디 c dysarthria. Conclusions This study affected on the spasticity dysarthria patients to make them experience the normal respiratory pattems and speaking in proper positions by treating them with Bobath πunk realignment and PNF for a positive outcome.