This study was conducted with the recognition of the problem that English speaking research is relatively insufficient despite the active use of movies in the field of foreign language education. The purpose of this study is to examine the effects of movie use on self-efficacy in speaking English for learners of Korea Polytechnic College. It is expected that meaningful research results will be derived when considering the correlation between movie use and English speaking, and English speaking and self-efficacy. The subjects of this study were English learners majoring in Power Plant and Diving, which are degree courses at Korea Polytechnic College, and a total of 33 students participated. As a research tool, an English speaking self-efficacy questionnaire was used, and for the analysis of the results, a case study method was adopted and quantitative analysis was performed using Jamovi, a statistical program. The results are as follows: First, learners showed high self-efficacy in speaking English through the use of movies. Second, the self-efficacy of speaking English was higher in the case of having previously experienced film use classes. Third, the movie use class showed statistically significant English speaking self-efficacy regardless of learners’ English level, but it was particularly effective for upper-level learners.