Abstract: What are the actual causes of conformity?Based on literature,the researcher supposed that there are five causes for conformity.100 children aged 8-16 were tested and their responses verified the supposition.Then 400 children of that age as subjects were asked to rank the above causes according to the order of importance they thought while facing two conformity situations presented, the length of line as the stimulation in the one, and the moral judgement in the other. The results showed the subjects believed the importance of order of the conformity causes were as follows,“considering the majority are correct”is the first, then “to show belonging to the group”,“to show friendship with others”,“to avoid being punished”, and the last is “to save effort and take little trouble for oneself”.Meanwhile, this trend showed distinct features among children between the younger and the elder,and between the different situations.

Key words: conformity causes, conformity situation, conformity response, important order