This book on science process skills has been written to be used as a reference book for student teachers of Biology and lecturers of science education in universities. The book gives a conceptual understanding of science process skills, the rationale of the process approach and literature review that concern science process skills. The author believes that science process skills should be acquired by science learners at all levels of learning. The author holds that science educators should employ the right pedagogic strategies that would engender the development of science process skills. The writers of science books should also integrate activities that stimulate the learners to see science as a process. Science process skills will help the learners to respond to emerging issues in the society in a positive and logical way.