The enthalpies of solution have been measured for a-alanine in NaBr, KBr and KI aqueous solutions at 298.15 K. The enthalpic interaction parameters h(xy), h(xyy) and h(xxy) of alpha-alanine with these salts have been evaluated. Combining the previous studies for other alkali metal halides, the experimental results are discussed in view of electrostatic and structural interactions.