Disclosed herein is an aluminum
alloy clad sheet for a
heat exchanger including a core layer, a sacrificial layer formed on one surface of the core layer, and a filler layer including an Al—Si based
alloy formed on the other surface of the core layer. The core layer includes a predetermined amount of Si, Cu, Mn, Ti, and Mg, the remainder including Al and inevitable impurities, and the sacrificial layer includes a predetermined amount of Si, Mn, and Zn, the remainder including Al and inevitable impurities. The core layer has a
crystal grain size after the
brazing heat treatment at 595° C. for 3 minutes of at least 50 μm and less than 300 μm. The filler layer and the sacrificial layer are defined for their thickness, and the number of
intermetallic compounds in the core layer is also defined to a predetermined range. By such constitution, the aluminum
alloy clad sheet has improved fatigue life and post-braze strength, high
corrosion resistance, and excellent
erosion resistance and brazeability.