The purpose of this study is to investigated type of teacher's humor and example on type, and analyzed differential success and failure by purpose, material and expression form of teacher's humor. And investigated and analyzed 571 cases of teacher's humor through student's memory. As a result, teacher usually use humor by ‘atmosphere conversion’ on purpose, ‘he and she and it’ on material and ‘storytelling’ on expression form. Mixture by purpose, material and expression form of teacher's humor, teachers usually use only 7 types in 48 humor's types and 7 types hold 68.1% of whole. According teacher's humor use too much emphasis on a few types. Also differential success and failure by purpose, material and expression form of teacher's humor, come out high failure on humor by ‘atmosphere conversion’ and ‘rapport making’ on purpose, ‘student’ on material and ‘words playing’ on expression form. According, purpose of humor put on ‘increase of memorization’ and ‘expansion of contents comprehension’, material of humor set ‘teacher oneself’ and expression form of humor keep up ‘storytelling’ than ‘words playing’. Because it is high success.