Self-Efficacy (SE) is the belief or perception of a pcrson that he or she is capable to perform a specific task. It is a dynamic element that influenccs other concepts such as goals, performance and is influenced by them. SE is an essential element in Social Cognitive Learning Theory. it plays a role of connecting goals, performance, and motivation concepts. it is one of the individual related concepts that function as a mediating mcchanism among these concepts. Various research results show that SE may be a good predictor of performance. Since SE may be a good predktor of performance, managers may try to assess the SE of candidates to predict their potential performancc, thus rcgulating their human resources practices such as selcction, adjustment, manager development ete.,according to thal. In the two studies wc have conducted, consistent with the results of previous research, moderate positive correlations (Study 1: .449, Study 2: .388) are found between SE and performance for a simple memory task.