Self-efficacy is someone's self-efficacy of the skills or talents that have been owned. In speaking skills self-efficacy has an important role for the success of students in completing the tasks given
by lecturers. The purpose of this study is to find out what factors cause students' self-efficacy in speaking skills and dominant factors. There are two research questions discussed in this study, (1)
What are the causes of self-efficacy students in speaking skills?, And (2) What are the dominant factors of high causes or low self-efficacy students in speaking skills? This research was conducted
using a descriptive qualitative approach. Participants in the study were students of the seventh semester English language study program at the University of Muhammadiyah Kotabumi. In conducting this research, researchers obtained data through a questionnaire. The results of this study indicate that of 8 students 4 of them have high self-efficacy and 2 low. From the results of
the data it can be seen that the average student is able to deal with different situations when completing the task. But behind the ability of students in the face of the situation, there are still those who sometimes have doubts about their own abilities. And that can happen because of several factors causing. The factors in question are previous successful experiences, encouragement from
others, and psychological situations. Of these Three Factors, Experience of The Past Success and Psychological Condition Action Factors That Have A Big Impact on Students' Self-efficacy in Speaking Skills.