The Alpha Phi Beta Fraternity is a fraternity based in the University of the Philippines College of Law with no recognized chapters outside University of the Philippines Diliman. The fraternity's membership hails from the College of Law and from pre-law colleges in the campus. 2019 marked the fraternity's 80th Anniversary. It is one of the three fraternities based in the college, the other two being Sigma Rho fraternity and Scintilla Juris.

The University of the Philippines College of Law is the law school of the University of the Philippines Diliman. Formally established in 1911 in UP Manila, it is the third oldest continually-operating law school in the Philippines. Since 1948, it has been based in UP Diliman in Quezon City, the flagship of the UP System's eight constituent universities. The college also holds extension classes at the Bonifacio Global City campus of UP Diliman in Taguig and the Iloilo City campus of UP Visayas.