The purpose of this study: Analysis and measurement the hidden elements in the quality cost to control and decrease this hidden elements, to achieve  the company's competitive advantage  and applied it's on the case study from Egyptian firm. In order to achieve the study objectives: We examined the quality cost elements   (direct and hidden) in the October Pharma company for medicines and medical supplies  - 6th of October City – Egypt , by using  Analytic Hierarchy Process (AHP) approach, through Personal interviews with managers and employees and distribute questionnaires to them, to identify the  quality cost elements ( direct and hidden) during the production phase and beyond, then analyze the hidden elements in the cost of quality according to its importance to measure the extent of its impact on the total cost of quality in order to achieve  the company's competitive advantage.  The results of the study : the results in this study indicate  that the hidden elements in this company represent a large percentage of the total cost of quality, which requires the company to control and manage it in a good way to reduce it, in order to reduce the cost of quality and then reduce the total cost of products and achieve  the company's competitive advantage.    Depending on this: this study recommended the necessity of studying all the hidden elements of the quality cost in other  Egypt firms with the aim of controlling it to reduce the total cost of quality and improve the company's competitive advantage in the market through  reducing customer dissatisfaction and retain them and improve quality and reduce the cost of product