This research aims to study about usage behavior of Facebook users their expectations uses and gratifications as well as the relation between expectations uses and gratifications of Facebook users and communication behavior found among students of 9 Faculties at Rajamangala University of Technology Phra Nakhon who are Facebook users. The research is conducted using survey as a research method and the data used in this research is taken from a sampling group of 400 students. The results of the study were as followed: the expectation uses gratification of Facebook users has positive relation at high level with communication on Facebook. Moreover the outcome has shown that the majority of the students at Rajamangala University of Technology Phra Nakhon use Facebook on a daily basis. Their expectation and usage levels are high and moderate respectively while gratification level is high.