Engineering Drawing is one of the compulsory courses in the Department of Mechanical Engineering in Indonesia. This course aims to equip students with basic understanding and skills in drawing. In this case, this study aimed to develop learning media in the form of interactive multimedia determining the level of eligibility of the developed multimedia, and testing the effectiveness of the developed multimedia in enhancing students’ understanding of the basic concepts of engineering drawings. For this reason, this study used an R and D design with the 4D model to produce and test the effectiveness of the developed multimedia. The product validity test was carried out by two experts, namely one material expert and one media expert. The effectiveness test, onegroup pretest-posttest design was carried out by involving 28 students of the Mechanical Engineering Education study program at Universitas Pendidikan Ganesha, Bali, Indonesia. The results showed that both material and media experts agreed that the developed multimedia was suitable for teaching equipment in the lecture process. The effectiveness test also showed that multimedia developed effectively increased students’ understanding of the basic concepts of engineering drawings. The use of interactive multimedia could improve students' motivation and independence in learning, thus increasing their understanding of the Engineering Drawing course concepts.