Achilles Heel (also known as Pedro the Lion's Achilles Heel) is the fourth and final album by indie rock band Pedro the Lion. It was released on May 25, 2004, on Jade Tree Records. The cover artwork was by Jesse LeDoux. It reached #26 on the Top Heatseekers and #24 on the Top Independent Albums charts.

All tracks by David Bazan except "Keep Swinging" (co-written with T.W. Walsh) and "Start Without Me" (T.W. Walsh).