This study describes the picture of the strength of the safety culture in the project area Y and company. X. Its scope is limited to artifact factors, espoused values and basic assumptions. The study design used was descriptive with qualitative data analysis technique. The results of the research with interviewees on 5 informants, field observation and document review show that safety culture in PT X is at a moderate level or can be interpreted as safety, cost and production are considered to overlap / reduce each other. The possible causes of this cultural weakness stem from supervisory of payment by result basis, workers' responses to management efforts are lacking, safety is not yet integrated into all parts of the company, inconsistencies of value being exposed and employee behavior and workers selection are not yet applicable. The researcher's recommendation is to maintain consistency and evaluate the supervisory for payment by result basis system.