The coal mining industry has some unique characteristics, that distinguish this industry with other industries: capital intensive, technology-intensive, and has high risk. A workplace accident is one of the risks that has high importance because can cause various losses such as material loss, disruptions to the production process and damages to the environment. MUTU coal company, a company engaged in the coal mining sector in Indonesia, is experiencing an increasing number of workplace accident by 34.7% from 2017 to 2018. The workplace accident caused by various factors from various sources or levels, starting from the level of operators, supervisors, management, and company. Human Factor Analysis and Classification Systems Method for Coal Mines (HFACS-CM) was used in this study to analyze human factors that cause workplace accident, starting from the level of unsafe acts, preconditions for unsafe acts, unsafe leadership, organizational influences, and external environmental factors. Structural Equation Modeling (SEM) was constructed to analyze the relationship between factors affecting workplace accident based on the HFACS-CM model. The result proved that external environmental has a significant impact on unsafe acts, preconditions for unsafe acts have a significant impact on unsafe acts, organizational influences have a significant impact on unsafe leadership, unsafe leadership has a significant effect on the preconditions for unsafe acts, and external environment is significantly related to organizational influences.