This research aims to investigate the casual effects of not only the level of ethic awareness in general among internet users but also the level of internet skills on inadequate behaviors in cuber spaces. This research also try to develop the framework for the cyber ethic educational program in order to establishing adequate attitudes in cuber spaces. For accomplishing the purposes of this research, the data, 522, had been collected from both on-line and off-line. The major statistical methods for data analysis were frequency, factor analysis, multiple regression, and path analysis. The results of this casual effect analysis were as follows: 1. There were positive direct causal effects of sex, occupation, place for internet use, and internet skills on inadequate behaviors in cuber spaces. On the other hand, the negative casual effect of the awareness of legal ethics on inadequate behaviors in cuber spaces. 2. Such variables as sex, age, internet-related and the awareness of ethics in general had indirect causal effects on the inadequate behaviors in cuber spaces through the variable which is the awareness of cyber ethics. The implications of this findings were discussed.