The purpose of this study vacs to investigate the relationship between communication and group cohesion in high school baseball team. How the communication-related factors such as an athlete`s communication with director, coaches, and other athletes, individual feedback organizational socialization, and the level of information influence the cohesion based factors like individual and goup centered socially oriented cohesion{ individual and goup centered task oriented cohesion was examined in this study. 251 high school baseball athletes registered in Seoul and Kyonggi-Do participated in this study, and self-assessment was adapted in the survey, The collected data were analyzed with one-way ANOVA, Correlation, and Multiple Regression Analysis. The results of the study are as follow; First, it was revealed that the relationship between individual feedback and communication with peers was significant. Communication with peers according to positions was analyzed significant. However, the relationship between communication with the director according to the level of game participation and the level of information was insignificant. Secondly, in the analysis of the relationship between individual characteristics and group cohesion, individual centered task oriented cohesion differ from position to position, In addition, all the independent variables have significant relationships with the level of game participation. Thirdly, positive relationships were come out significant between individual feedback and individual centered task oriented cohesion, between communication with the coach and group cohesion, individual and goup centered task oriented choesion and group centered socially oriented cohesion between communication with peers and group cnetered taks oriented sochesion and individual centered socially oriented choesion. However, it was revealed that the relationship between the level of information and group and indivisual cohesion were insignificant.