Self-directed learning readiness (SDLR) is well-known as one of internal factors as well as the amount of time spent for learning that can certainly be used as a predictor for the success of the learning process in which student learning will result in a satisfactory academic achievement. This study analyzes the relationship of SDLR to the medical student’s achievement, the relationship of study time towards the student’s academic performance of medical students. This study conducted in July 2016 which involved 88 respondents of third level medical students. Data were analyzed using independent t test. There is a correlation between self-directed learning readiness (SDLR) and academic achievement with t value of 0,505 and p value of 0,615 and also there is a correlation between study time and academic achievement with t value of 2,267 and p value of 0,027. In overall, there is significant relationship between self-directed learning readiness and study time on academic achievement of medical students with F : 2,930 and R: 0,254.