This study aimed to know the relation between internet addiction and both of depression and, social isolation with Nizwa university student. The study sample consisted of (346) student, (56) male and (290) female from first year after foundation to fifth academic year and, from all four university collages. Study methods included: internet addiction scale prepared by Ahmed (2007), isolation scale prepared by AL-Mzahara (2002), and "Beck" list, second Arabized of depression translated by Gharib (2000). The outcomes resulted that the percentage of internet addiction diffusion was (4.9%) with the study sample. Also the results indicated to the differences that have statistic significance within the average of persons grades of the sample on internet addiction because of social type and study specialization for female students and, science and arts specialization while that results did not illustrate differences that have statistic significance A because of GPA and the family financial status .In addition, the results indicated to negative related relation that has statistic significance between the average of internet addiction and depression. Also, the results illustrate positive related relation that has statistic significance between internet addiction and social isolation with study sample. Also, the results illustrate the existence of difference that have statistic significance between the calculating averages for each depression and social isolation with study sample individuals because of the difference of their internet addiction grades. Also the results show that internet addiction with study sample individuals may forecast of depression and social isolation and their dimensions but in low way.