A method for separately collecting an optically active amino acid amide
and an optically active amino acid from an aqueous solution containing
same, together with at least one member selected from the group
consisting of an acid, a base, and a salt, includes a step of
neutralizing an acid or base in the aqueous solution, a desalting step of
removing a salt contained in the aqueous solution and/or formed in the
neutralization step, and a step of separately collecting the optically
active amino acid amide/amino acid separately from the desalted aqueous
solution by a process which takes advantage of a difference in solubility
between the two components in an organic solvent. The desalting step is
preferably performed by electrodialysis, optionally with ammonia added to
the aqueous solution. The optically active amino acid amide/amino acid
can be separately collected with high efficiency using an organic
solvent.