This study has a close relation with the research done by Lewis, H. B., Franklin, M., Alper, T. G., Glixman, A. F., and Rosenzweig, S.. This present study is one of our studies concerning the Recall of the Completed and Interrupted Tasks. The aims of the paper are three items as follows : 1. Though the results that the immediate recall is superior to the delayed recall has been recognized generally since Ebbinghaus, the writers intand to take investigation whether this phenomenon effected by the completed and the interrupted tasks and also modification on stress existence in the learning fields. 2. What is difference on stress situation among 3 grouds, the first is the total completed tasks in series, the second is the interrupted tasks in series, and the third is the half completed tasks and the half interrupted tasks. 3. In case of the second, how time process until recall will be exibit after performance ? The subject is 60 junior high schoolstudents. The material is jig-saw picture puzzle. The results are as follows : 1. The superior recall of the interrupted tasks that has been populared is not recognized when the total interrupted tasks in series is recalled. 2. About stress situation, the 24 hours delayed recall is superior to the immediate recall. On non-stress situation, the dirference has not been found between both recalls. 3. In case of the half completed tasks and the half interrupted tasks, the completed tasks and the half interrupted the completed tasks is superior to the interrupted tasks on recall of non-stress situation, when the immediate recall is compared with the 24 hours delayed recall. Under the same condition, the interrupted tasks has more recalls than the completed tasks on stress situation after 24 hours. 4. In another words, as for u/c ratio, 1.09 has increased to 1.19 on the stress situation, and 1.33 has decreased to 1.05 on the non-stress situation after 24 hours. According to the facts mentioned the above, the interrupted task under stress situa tion seems to be influenced by the effect of "repression" mechanism.