This study aimed to identify the effect of one-leg squat using a slide on hip strength, and Q angle in patients with chronic hip joint pain patients. Thirty participants subjects were recruited for this study. The experimental group applied one-leg squat using a slide and performed to intervention 3 times a week, 4 weeks, 3 sets of 10 times were performed. All participants have measured hip strengths, and Q angle in before and after the intervention. After the interventions, experimental group showed greater improvement in side bridge, hip abduction, external rotation, extension strength and Q angle than in the pre-test (p<.05). This study shows that one-leg squat using a slide improved hip strengths and Q angle in patients with chronic hip joint pain. These findings suggest that the one-leg squat using a slide has a potential for benefits on hip strengths and Q angle.