School counselor efficacy in their ability to understand students is needed, one of which is in the implementation of individual counselling services. School counselor self-efficacy in counselling can affect counselling performance and outcomes. A number of studies have proven the importance of school counselor self-efficacy in implementing counselling. However, in Indonesia there is no instrument that measures counselling self-efficacy of school counselor. This study aims to determine the level of counselling self-efficacy of school counselor. The counselling self-efficacy scale was developed based on the skills used in the general counselling stage. The counselling self-efficacy scale consists of 3 dimensions with 35 statement items. This type of research is quantitative research with a descriptive approach. The research respondents were 40 high school school counselor in Solok district, the sample was drawn using total sampling technique. Data were collected using the individual counselling self-efficacy scale, which was developed based on the Likert scale model. The collected data were processed using descriptive analysis with the help of Microsoft Excel program. The results revealed that in general, counselling self-efficacy of school counselor was in the moderate category. The discussion focuses on aspects of counselling self-efficacy and implications for guidance and counselling services.