The purpose of this study to know how Group Facebook support students' self directed learning especially through online way. Therefore, the proliferation of digital, social network sites and mobile technologies have created a culture which the youth as a student become the participant. It changes the way students' communicate, interact each other and also the way of learning. Case study methodology also allows researcher to emphasize the context, specializes in deep data and thick description. From this perspective, Group Facebook is very support for students' self directed learning especially in online environment or called Self Directed Online Learning. This is an analysis regarding the evidences particularly proved by the transcripts of students' interview to show the activities in Group Facebook. This article reports that Group Facebook as one feature of the most popular social network site help students' as a bridge of discussion, e-portfolio, discussion place, and a place to enhance the knowledge.