This paper describes the development of an e-Learning solution in 3D CAD operation training. The e-Learning contents have following features. In operation, the contents indicate the instruction window and 3D CAD (Pro/ENGINEER[○!R]) window in same display simultaneously. The motif of the exercise models is familiar to class and enhances the motives for the exercise. The contents of the e-Learning are based on SCORM (Shareable Content Object Reference Model) standard and able to supervise the progress of the class individually. The effectiveness of the contents is confirmed by achievement check in design class exercises.