This research aims to study work discipline, work motivation, work environment, and performance and analyze the level of significance simultaneously, partially, and dominantly on the influence of work discipline, work motivation, and work environment on the performance of Air Force Central Hospital (RSPAU) members Dr. Suhardi Hardjolukito Yogyakarta, analyzed the level of significance of the influence of work discipline, work motivation and work environment partially on the performance of RSPAU members Dr. Suhardi Hardjolukito Yogyakarta. Location: This research was conducted at RSPAU by Dr. Suhardi Hardjolukito Yogyakarta, whose address is JL. Janti Yogyakarta, Adisutjipto Air Base, Jl. East Ringroad, Karang Janbe, Banguntapan, Kec. Banguntapan, Bantul Regency, Special Region of Yogyakarta 55198. The population and sample for this study were all specialist doctors at the Dr. Air Force Central Hospital (RSPAU). Suhardi Hardjolukito Yogyakarta has 72 members. Data analysis in this research was carried out using descriptive analysis techniques and multiple linear regression analysis. The research results show that work discipline, work motivation, and work environment significantly affect the performance of RSPAU members Dr. Suhardi Hardjolukito Yogyakarta. In this way, the performance of RSPAU member Dr. Suhardi Hardjolukito Yogyakarta is greatly influenced by the quality, quantity, motivation, discipline, and work environment. It is hoped that the contribution of this research can be a practical and theoretical reference for the RSPAU so that it can find out how members' attitudes towards work discipline, work motivation, and work environment variables affect performance and can also be used as a reference in carrying out strategic steps in order to improve member performance.