The aim of this research are (1) to study and analyze The influence of the head master leadership style and teacher working ethos toward teacher working performance on Al-Azhar Syifa Budi Solo simultaneously, (2) the influence of the head master leadership style toward teacher working performance on Al- Azhar Syifa Budi Solo, (3) teacher working ethos toward teacher working performance on Al- Azhar Syifa Budi Solo, (4) which one gives more influence between the head master leadership style or teacher working ethos toward teacher working performance on Al- Azhar Syifa Budi Solo.
The method used in this research was descriptive quantitative method. The sample was taken using quota purposive sampling technique with 62 teachers as participants. Data analysis technique used was multiple regressions.
Based on the results of this research, it can be known that the head master leadership style and teacher working ethos influence toward teacher working performance simultaneously (Fobtain > Ftable or 34.786 > 3.15 on db = 2, dk = 59 on significance level 5%). the head master leadership style influences toward teacher working performance (tobtain > ttable or 3.116 > 2.000 on N = 62, on significance level 5%). teacher working ethos influence toward teacher working performance (tobtain > ttable or 4.435 > 2.000 on N = 62 on significance level 5%). teacher working ethos gives more influence toward teacher working performance than the head master leadership style (Pearson correlation for the head master leadership style = 0.623 and Pearson correlation for teacher working ethos = 0.682).
Key words : The head master leadership style, teacher working ethos, and teacher working performanc