The word ‘concept’ is used with several meanings in mathematics education. In order to obtain a coherent theoretical framework, a concept analysis of the notion concept is performed for some current frameworks in the field. The taken approach includes creating a tool for analysing views on concept, based on a literature review in philosophy. This tool uses three distinctions of views on concept: mental versus abstract, subjective versus intersubjective, and molecular versus holistic. Examples from texts in mathematics education are given, where the three distinctions are present. Further, the taken approach offers a perspective on concept that simplifies comparisons between frameworks.