An assessment of the professional needs of science teachers was conducted in order to aid in the development of more effective preservice and inservice teacher training programs in Malaysia. A modified version of the Teacher Need Assessment Questionnaire was administered to 78 science teachers. Data analysis indicated that the top 25 perceived needs were mainly related to self-improvement. The five items rated as highest priority included: being creative in science instruction, updating knowledge in the application of science and technology in everyday life, updating knowledge of innovations in science instruction, updating knowledge in evaluating teaching effectiveness, and understanding the goals of the syllabus. Implications for teacher preparation in preservice and inservice programs are discussed. (JRH)