This research is a preliminary study conducted to describe the profile of critical and creative thinking of undergraduate students of biology education at Universitas Negeri Yogyakarta (YSU). This research was conducted on 59 students who have active status as undergraduate students of the biology education program at YSU. The instrument used was a habit of mind instrument of critical and creative thinking in the form of a Likert scale questionnaire. After obtaining the data, then the data were analyzed descriptively. The results showed that the students' critical thinking and creative thinking scores were in the fair category.