The purpose of this study is to delineate the internal adjustment factors asa well as the physicl and mental health states of social welfare workers in Korea(K-group)and Japan(J-group).I have acquired four factors from this research:evaluation on working environment and condetion;relation with user;sense of satisfaction;and sense of confidence with their job. I condusted a comparative study between Korea and Japan,using the four factors that constitute Internal Adjustment.This comparative study showed that K-group is more satisfied with their job than J-group in three factors(as for the fourth factor,working environment and condition,it was excluded).In addition, it showed also that K-group is far healthier physically and mentally than J-group. THe result of this study indicates that some necessary steps should be taken,e.g.,increased manpower and salary,rationalization of system and others to promote Internal Adjustment for workers who work long-term,as well as mental health for young workers who are new to this field and have worked only short-term.