The aim of the study was to find out the factors affectingstudents’ performance in group discussion. There are four factors which are affecting the students’ performance in group discussion based on the students’ perception in their learning process at university in Yogyakarta. For gathering the data, the interview involved two female students university in Yogyakarta. This study used a qualitative research design and specifically employed the descriptive qualitative research. The researcher chose the interview as the instrument of this study to gather the data. In analyzing the data, the researcher used three kinds of coding including open, axial, and selective coding to get final categorization of the data. Prior to it, the researcher had already done member checking to get validity of the data before analyzing the data. Based on the answers of those participants, it was revealed that there were four factors affecting students’ performance in group discussion. Most of students felt the effect of confidence, motivation, ability, and knowledge that affected their performance in group discussion.