This research aimed to described organizational cultural and style of leadership, analyzing organizational culture pursuant to style of leadership, analyzing organizational culture influence to performance of lecture, and analyzing the direct and indirect influence of leadership style to the private university lectures' performance. In taking the sample it uses multi stages of sampling with amount of sample as much 280 lectures. Data collecting uses questionaire, interview and detection of relevant document; while analysis the data uses descriptive analysis and path analysis. The result of research indicate that: style of authority leadership have a negative effect and significant to organizational culture; style of democratic leadership and laissez faire have positive effect and significant to organizational cultures; style of democratic and authoritarian leadership have a positive effect and significant to the lectures' performance; style of leadership laissez faire have a negative effect and significant to the lectures' performance; organizational cultural have a positive effect and significant to the lectures' performance; leadership authority and democratic style indirectly influence positively and significant to the lectures' performance; and leadership style of laissez faire indirectly negatively influences the lectures' performance.