This study aims to reveal the relationship between the professional identity and self-efficacy among psychologists. The sample consists of 136 male and female psychologists. The researcher has used the descriptive correlative approach in addition to two scales: the professional identity scale (Al-Smadi, 2019) and the self-efficacy scale (Al-Jdouh and Melhem, 2020). The results show that the level of professional identity comes very high in total of the scale and in its sub-dimensions of the study sample. The results have indicated the existence of a positive direct correlation with statistical significance between the dimensions of professional identity and the level of self-efficacy among psychologists at the level of statistical significance (α ≤ 0.05). The results have showed also that there are no statistically significant differences in the estimates of the study sample members in the overall scale of professional identity due to the variables of gender, age and years of experience. The results have showed that there were no statistically significant differences in the study sample members' estimation of the level of self-efficacy based on the variables of gender, age, and years of experience. The results also have indicated the existence of a statistically significant effect of the professional identity with its combined dimensions on self-efficacy. The study concludes that there is a strong positive correlation between both professional identity and self-efficacy among psychologists in the Sultanate of Oman. Finally, following the discussion of the results, the researcher has reached a set of recommendations.