Conditions for nurses' daily patient education work are unclear and require clarification. The aim was to develop and validate the Nurses' Patient Education Questionnaire, a questionnaire that assesses nurses' perceptions of appropriate conditions for patient education work: what nurses say they actually do and what they think about what they do. The questionnaire was developed from a literature review, resulting in the development of five domains. This was followed by 'cognitive interviewing' with 14 nurses and dialogue with 5 pedagogical experts. The five domains were identified as significant for assessing nurses' beliefs and knowledge; education environment; health care organisation; interdisciplinary cooperation and collegial teamwork; and patient education activities. A content validity index was used for agreement of relevance and consensus of items by nurses (n = 10). The total number of items in the final questionnaire is 60, consisting of demographic items, what nurses report they do and perceptions about patient education in daily work. The questionnaire can be used by managers and nurses to identify possibilities and barriers to patient education in different care contexts.