This research aimed to understand the relevance between irritable bowel syndrome (IBS) and sleep quality for dental hygiene students in certainareas. It was conducted on 344 students from four universities in Jeollabuk-do from May to September 2013 using a structured questionnaire. Thefollowing are the results. 57.6% of the IBS bowel movement conditions were mixed type, 10.5% constipation type, 7.6% uncategorized, and 6.1%diarrhea type. For sleep quality based on the subjects' general characteristics, third years were 11.45, second years 10.90, and first years 9.53(p=0.034). The sleep quality was statistically significantly lower as the years increased, and even for IBS (p=0.026), it was low and showed asignificant difference. For difference in sleep quality based on IBS presence, habitual sleep efficiency, sleeping pill dosage (p=0.043), and day timefunctional disorder (p=0.007) showed statistically significant differences and lower sleep quality than the control group. For difference in sleep qualitybased on IBS bowel movement condition, mixed type was the highest for sleep disturbance at 6.86, constipation type was 1.00 for habitual sleepefficiency, constipation type was 1.42 for subjective sleep quality, uncategorized type was 0.15 for sleeping pill dosage but not statisticallysignificant. In day time functional disorder, constipation type was the highest at 2.61 and showed a significant difference (p=0.012). The correlationbetween the sub-factors of sleep quality was positive. Based on the above study results, we learned that for IBS, sleep quality becomes lower asthe year increases, and functional disorder was observed during day time due to low sleep quality. Education on IBS symptoms is needed, adequatestress management method to alleviate symptoms and prevention programs for correct diet must be developed to enhance sleep quality.