Today and especially in large companies, internal communication emerges as an important strategic asset. Internal communication is a management assistance tool. It cannot be designed or performed independently. It evolves with the organization and through it. It seems essential to give importance to men because it is they who make the company and not the reverse. This importance is manifest as listening and optimal internal communication that passes through the achievement of many goals for the business. Hence the interest of this article summarizes a study in a Moroccan organization. This investigation concerns the internal communication within an organization operating in the field of insurance. This is achieved diagnosis to identify some strengths and weaknesses in order to propose ways forward in internal communication system. The objective is to make an inventory of the existing while analyzing communication needs. The methodology to carry out this study is as follows: first a pre investigation comprised interviews and a questionnaire 1. The goal was to test the waters to collect the interviewees felt about the internal communication. This step is fundamental because it is a transitional phase to the second experimental stage, which is structured around two in the first steps that the TGN (The nominal group technique) to be followed by a questionnaire 2. The three investigative tools used in this study will be a return of the collected data will be opened, analyzed and interpreted in terms of impact and delete on the internal communication process.