A major aspect that educational psychology is concerned about is the study, analysis and introduction of those theories, and rules of learning that can help teachers in the process of teaching. Present research aimed to study the range of familiarity of elementary school teachers with learning theories and their application in teaching process. To this aim 170 teachers were selected through random – class sampling proportionate to the volume of the statistical society, among elementary school teachers of Isfahan city. Research results showed that the teachers' familiarity with learning theories was below the average. In other words, teachers’ grade mean for the learning theories measurement test was less than ten (out of twenty). The highest mean belonged to the behaviorism theories (8.78) and the lowest mean belonged to meta-cognitive theories (6.38).