The intense level of construction business competition demands that Construction Company has to improve their performance to compete with other construction companies. One of the performances that need to be improved is Quality Performance. PT XYZ as a foundation specialist contractor operating in Indonesia seeks to improve Quality Performance in order to face competition in the foundation construction business in Indonesia. The purpose of the study is to analyze the effect of Total Quality Management (TQM) on Quality Performance mediated by Knowledge Management and Quality Culture in PT XYZ. The research method used quantitative research method. This study used primary data and analysis data using Structural Equation Modeling–Partial Least Square (SEM-PLS). The employee population is 259 employees and sample of this study is 53 employees at different positions level of PT XYZ. The results showed that Total Quality Management, Knowledge Management, and Quality Culture had positive and significant effect on Quality Performance at PT XYZ. Knowledge Management and Quality Culture can mediate the effect of TQM on Quality Performance.

Keywords : TQM, Knowledge Management, Quality Culture, Quality Performance, Construction Industry.