In the current study, the source of self-efficacy beliefs of school counsellors and enhancement strategies were investigated using a qualitative approach. A phenomenological research design was used in the current study. Nineteen school counsellors from Turkey participated in the study (11 of them female). For data collection, a semistructured interview technique was used, and for data analysis, thematic and content analyses were undertaken, resulting in particular themes and categories. Sources of school counsellor self-efficacy and likely enhancement strategies were collected under five themes: counselling skills, management of group behaviour, working with resistant students, consultation, and assessment techniques by using content analysis. Results were discussed in line with the literature and suggestions were given.