After a brief overview of the basic education in Hong Kong, this chapter illustrates the historical development and changes of primary science education that have taken place in Hong Kong over 50 years. Following this, efforts are made to describe the current primary science education as integrated in the course General Studies, pupils’ informal learning opportunities in science events as extracurricular activities, and the status of science teacher education. A review of the research is conducted on the implemented curriculum which reflects the concern of Hong Kong science educators regarding primary pupils’ science learning. The final section focuses on discussing three recent trends in Hong Kong primary science education, i.e., STEM education, IT in science learning, and education for environmental sustainability. Copyright © 2018 Springer International Publishing AG, part of Springer Nature.