Biology Fair (PRB) UIN Sunan Kalijaga is an annual event that is always anticipated by Biology Study Programme students. PRB is one of the real efforts of students' concern for environmental issues. Organised by Biology students of UIN Sunan Kalijaga, PRB aims to inspire and raise awareness of the younger generation on the importance of preserving the environment. 

The series of PRB events were packaged in an interesting and informative manner, ranging from exhibitions featuring works and innovations from various Study Groups (KS) such as Botany, BIOLASKA, Waterforum, and Bioenter, to national seminars presenting renowned experts to discuss actual themes such as plastic waste management, insect extinction, and biodiversity preservation. 

Not only that, PRB was also enlivened with various national competitions that tested creativity and knowledge, such as photography competitions that capture the beauty of nature, poster competitions that voice environmental aspirations, Biolimpic that tests students' understanding of biology, and lighter competitions such as Mobile Legend and futsal to strengthen friendship.