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In the construction industry, despite the development of technology and the efforts of companies, safety accidents are frequent, and the types of accidents are also diversified. In particular, when looking at the accident rates of the construction industry, the number of deaths from fall accidents accounts for a very high proportion. To resolve this, various measures to prevent fall, such as installation of safety railings and safety nets, have been proposed at the national level, but the effect is very insignificant. Therefore, it is necessary to establish measures for safety management and to propose prevention techniques by in-depth analysis of the causes of fall accidents through actual accident cases at the construction sites. The purpose of this study is to assess the risk of the cause of fall accidents for sustainable safety management at construction sites. To this end, data collection of fall accident cases at domestic construction sites, risk assessment by cause, and fall accident prevention techniques are conducted in order. This study was conducted on fall accident cases that occurred at a height of more than 2m. The results of this study will contribute to substantially reducing fall accidents at construction sites in South Korea. Additionally, it is used as basic data for improving Korea's construction safety management system.