Comprehensive studies on the Hong Kong primary science curriculum are rare. This study is to fill the knowledge gap by examining the science curricula for all primary grade levels from the 1960s to 1990s in Hong Kong. Critical features related to the most important aspects of the intended curriculum are identified and compared, thereby identifying the trends of primary science curriculum development in local context. It is found that the area of learning related to science and technology will become indispensable in the new educational innovation.[Copyright © 2000 The Hong Kong Institute of Education.]