M Many factors affect the safety and operation of construction and can lead to accidents, such as the condition of temporary structures including scaffolding. Reinforced concrete construction, particularly construction formwork, pouring concrete into the formwork, and the failure of the formwork during the construction phase and on a retaining wall. This research was conducted with the approach of the questionnaire, 50 questionnaires were distributed, re 40, there are 21 risk variables, with 18 variables were valid, having assessed the value of the index, gained 10 risk variables with great influence, namely, three variables were very high, and 7 variables with high category, valiabel very high, namely the installation of concrete that is not appropriate or too quickly on the job formwork, the lateral pressure that led to the failure of construction as well as sliding anderrors in binding scaffolding.