Abstract: The present research aims to reveal the relationship between the executive functions and the difficulty of feeling quantity in the students of the primary stage. The research problem was determined in the following two main questions: is there a relationship between the executive functions and the difficulty of sense of quantity for elementary students. What percentage of the contribution of executive functions in predicting the difficulty of sense of quantity in primary school students. The current research sample consisted of (389) male and female students which constitute (2.7%) of the research community with (204) students (52.5%) and 185 students (47.5%). Some of the necessary measures have been taken including the adoption of the executive functions scale prepared by Peter K. Isquith, PhD & Gerard A. Gioia, PhD and PAR Staff, 2000, after the translation of the original version. In order to prepare the test paragraphs of the sense of quantity, the following steps have been followed: the literature and the previous studies were reviewed in the Arab and Foreign countries through which the researcher drew her ideas in the preparation of the test items which include some activities and tasks that can measure some of the mental aspects related to the variable under study (sense of quantity) in the students of the third grade primary. For the purpose of adopting the best method of measurement has been taking the views of professors specialized in psychological measurement and educational psychology as they agreed to adopt the forms as the most appropriate and the most accurate and in accordance with the theoretical concept adopted in the research (40) one of the forms that measure the sense of quantity was selected from multiple scales. One of them was chosen as an example of clarification. The research reached a number of results including: there is a clear correlation between the deficiencies in the performance of executive functions and the difficulty of sense of quantity among students in the third grade primary. All areas of executive functions contribute to predict the sense of quantity and there is a difference between these areas in terms of strength of contribution. In the light of these findings, the study summarized a number of conclusions, recommendations and proposals.