The current study aims to know the level of mental health among university students in some university institutions in Algeria, and to detect differences in mental health according to the variable of age, gender and specialization, and to detect differences in mental health disorders, we used the descriptive approach on a non-random sample available, where it reached 42 students, and to answer the questions of the study and test its hypotheses, we relied on the modified mental health questionnaire on the Algerian environment "-R SCL - 90", and after processing the data by statistical methods Statistics The study found the following: 1. The level of mental health of undergraduate students is low. 2. There are no differences in mental health attributed to the age variable of the university student. 3. There are no differences in mental health attributed to the gender variable in the university student. 4. There are no differences in mental health due to the level variable (bachelor, master, doctorate) when the university student. 5. There are statistically significant differences between mental health disorders.