An evaluation method is developed which is applicable to teachers' training from the view point of speaking skill as teacher's behavior. Speaking skill mentioned here can be refered to phonetic expression technique or a way of speaking" as a more ordinal expression. In general, as reading a passage with or without intonations makes difference in listeners' impression, we select the evaluation terms regarding the point. The development is done as follows. (1) The speeches of experienced teachers and several trainees were recorded in the digital method. (2) Letting subjects listen to the records, selecting terms on each of which the speech of experienced teacher differs from that of trainees, then we regard each term as evaluation item. (3) In teachers' training, it is necessary to feedback aggregated result of the evaluation immediately and let the trainee know it. So, we adopt radar chart from the viewpoint of easiness of looking at and express the result on it visually. Then we discuss an example of the administration of the evaluation above using the method.