PURPOSE: To provide an aluminum alloy for heat exchanger tube material capable of increasing the rigidity of a heat exchanger without deteriorating its productivity.

CONSTITUTION: The aluminum alloy is (1) an aluminum alloy for heat exchanger tube material having a composition consisting of, by weight, 0.1-0.8% Si, 0.01-0.1% Cu, 0.2-0.8% Mg, and the balance Al with inevitable impurities and (2) an aluminum alloy for heat exchanger tube material having a composition containing, by weight, 0.1-0.8% Si, 0.01-0.1% Cu, 0.2-0.8% Mg, and further ≤0.2% Cr and/or ≤0.1% Ti.