Based on previous researches and current research indoor contaminations in most of the time were more than outdoor contaminations. In according to, most of our times have been spent in indoor environments (85-90%), therefore, it is necessary to investigate indoor environments. Symptoms of sick building syndrome are Headache, dizziness, drowsiness. Unknown reasons of disease above mentioned and improvement and Fixing problems have emerged in people after moving from these buildings. In this research, we investigated basic symptoms of syndrome in illnesses of sick buildings. We designed a questionnaire and asked from male of dormitory residence. Questions of the questionnaire were more about known symptoms of buildings (Shortness of breath, inflammation, swelling and burning eyes, runny nose, malaise and fatigue, drowsiness, headache). Results of research indicated that lack of ventilation system, noises, contaminated materials, cars smoke, noses of crowded streets and high humidity are that most important reasons of sick building syndrome respectively.