The purpose of this study is to examine organizational factors that affect the retention of young fulltime employees, including the perspective of “human relations”. This article focuses on the “communication with Human Resource Department (HR)” and clarifies whether communication satisfaction (CS) is an important retention factor. First, the data from the interview survey of young fulltime employees who have never retired are analyzed using the KJ method to classify retention factors. As the result, it is shown that “communication with HR” is one of the retention factors as a new finding. Then, based on a questionnaire survey of young employees in major Japanese companies (N=194), it is examined the impact of “CS with supervisors or HR” on intentions to stay. The results of a two-way analysis of variance suggest that the intentions increase as “CS with supervisors” goes from medium to high groups and “CS with HR” goes from low to medium groups. It is also shown that “CS with HR” affects intentions to saty independently of “CS with supervisors”.