Antonio Arnáiz Avenue, also known simply as Avenida Arnáiz and by its former official name Pásay Road, is a major east–west collector road linking Makati and Pasay in the Philippines. It stretches across western Metro Manila from Roxas Boulevard in Pasay to Epifanio de los Santos Avenue (EDSA/C-4) in Makati.
The Osmeña Highway splits Arnaiz Avenue into two sections. The western section, found mostly in Pasay, is a congested and highly pedestrianized road that used to be known as Calle Libertad. This section passes through some of the most important Pasay landmarks, such as the Cuneta Astrodome, Cartimar shopping district and Santa Clara de Montefalco Parish. Also located within the vicinity are the Department of Foreign Affairs building, old Pasay City Hall, Pasay City Sports Complex, and Pasay Cemetery.