This study examines pre-service science teachers' perceptions of teaching competencies for fostering students' science core competencies and discusses implications for pre-service teacher education. A survey was conducted with two parts: one assessing how science education courses contributed to teaching competencies, and the other evaluating pre-service teachers' perceptions of 38 competency indicators, adapted from research on in-service science teachers. Analysis of responses from 163 pre-service teachers who completed teaching practicum revealed that science education courses were highly valued in developing teaching competencies, scoring above 4 on a 5-point Likert scale. 'Teaching Practicum' and 'Teaching Materials Research and Instruction' courses scored particularly high (above 4.5), highlighting their importance in increasing interest on teaching competency and aiding lesson design and implementation. Regarding the perception of science core competencies, 'Communication and Collaboration Competency' was rated the highest, followed by 'Information Processing and Decision Making Competency', 'Scientific Inquiry Competency', 'Scientific Thinking Competency', and 'Hyper-connected Society Response...