This research aimed at developing computer-based instructional media using Adobe Flash for the tenth graders' English speaking skill material. The study employed research and development method. The results showed (1) the product is a computer-based instructional media in a combined format of tutorial and drilling facilitating semi-interactive learning consisting of thanking, complimenting, congratulating, surprise and disbelief materials; (2) the expert validation showed that the product quality in terms of media is categorized very good (4.51) and in terms of the material and instructional are categorized good (3.91). The results of the field trials showed that the quality of the product in terms of material, media, and instructional is categorized very good (4.32). In conclusion, the developed media is eligible to be implemented in speaking learning activities.