Understanding nature of science (NOS) is a fundamental goal in science education standards. Due to the role of specialised and educational teachers' preparation programmes in developing their NOS concepts, this study aims to identify views on NOS and attitudes toward teaching NOS among Saudi undergraduate chemistry students and the differences between them according to their academic level and university affiliation. Views on science and education questionnaire were distributed among chemistry students in eight universities. Results found inaccurate views regarding the differences between theories and laws, and that pertaining to well-trained scientists as being detached from personal, social, and cultural values. Half of the sample disagreed on inventing theories and laws and the diversity of Scientists' methods and also rejected teaching a variety of methods and the influence of personal beliefs on Scientists' observations. No significant differences among students' views by academic level or universities were found, except that second-level students have more informed views than fifth-level students, and the UHB and JU students' views were more informed than IMSIU students. The authors recommend developing those NOS concepts which students had shortcomings in the sequential teachers' preparation programmes and suggest recognising chemistry department faculty members' attitudes to developing students' NOS concepts.