The concrete method on how to learn metal processing effectively in industrial art course was discussed in the field of educational engineerig referring to questionaire on exercise and evaluation of the products made by learner. The effective method of practical exercise to learn how to use manual tools and machine tools was introduced. Guidance, which is composed of lecture and practical exercise, gives learner remarkable understanding on metal working. It is necessary for learner to know how to work metal by making familiar products in order to understand educational meaning of metal working sufficiently.