The study aims to investigate the relationship between subjective well-being and its two dimensions which are cognitive (life satisfaction) and affective (happiness), and the big five factors of personality (openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism) among students in University of Nizwa. The study is conducted to determine the level of subjective well-being, cognitive and affective dimensions to the students of the University of Nizwa, as well as identifying personal qualities peculiar of students of the University of Nizwa, reflected in performance on a scale of five major factors of personality (Neuroticism, Extraversion, Agreeableness, Openness to Experience, Consciousness). Additionally, a random sample was selected for the study in size of 400 students including 170 male, 230 were using subjective well-being (mortgaged, 2011), the five major factors scale profile of Costa and McCrea 1992 localizations Ansari (2002). Furthermore, after processing the data statistically using SPSS statistical package, the study found several results, including the level of subjective well-being. As a result, Nizwa University students, come to a high degree on all axles, and that five major ranking factors profile among university students in Nizwa come in accordance with the following order; consciousness, openness to experience, agreeableness, extraversion, neuroticism, where the results of the study show that the predominant factor in Nizwa University is a Consciousness. As this study aims to reveal the nature of the relationships between personal well- being (ingredients), the big five factors of personality in the study sample of students from the University of Nizwa, and the results of the study show the variable happiness statistically positive associated both with extraversion (0.01), openness to experience (0.01), and conscientious (0.01). While the statistical significance of the correlation coefficients between happiness, neuroticism and agreeableness variables are absent, as well as the results show the absence of differences in subjective wellbeing variables (full mark), happiness and life satisfaction among males and females.