In order to prepare effective safety management program, the evaluation of safety management level must be implemented. But research efforts on the safety management in Korea are limited to evaluate large construction companies. This study is initiated with the purpose of understanding safety management system in medium- and small-sized construction companies. The study performed questionnaire survey with 54 large companies, 46 medium-and small-sized ones. Employing `Management Safety Health Index` of Maekyung Economic Institute, 34 questionnaire items were chosen by 9 associated experts. Based on the questionnaire survey, analyses were performed to compared safety management level between large companies as well as medium- and small-sized ones.