It is known that the internet whose user number has been increasing day by day causes ethic problems besides its advantages. It is essential to get individuals adopt the habit of using the internet according to ethical rules since their primary education school ages in terms of preventing related problems in society. The general aim of this study is to determine the unethical internet usage behaviors of primary students in terms of various variables. The study group of this descriptive research consists of 6, 7 and 8th grade students (n=1761) attending various primary education schools. The data collection instrument developed by the researchers contains items about demographic characteristics and unethical behaviors. Frequency (f), percentage (%) and Chi-square (chi(2)) test of independence were used in data analyses. Research findings revealed that the gender, the duration of internet usage and the situation of connecting the internet in a cafe are affecting almost all unethical behaviors which are exhibited and exposed. Accordingly the following suggestions were made; students, families and teachers should be informed about using the internet considering ethical rules; students' duration and places of internet usage and internet activities should be controlled by their parents; related legal and technical precautions should be taken; studies should be carried out in order to improve the internet cafes and investigate the causes of unethical internet behaviors among primary education school students. (C) 2011 Published by Elsevier Ltd.