  We present a novel procedure to purify quantum states, i.e., purification
through Zeno-like measurements. By simply repeating one and the same
measurement on a quantum system, one can purify another system in interaction
with the former. The conditions for the (efficient) purification are specified
on a rather general setting, and the framework of the method possesses wide
applicability. It is explicitly demonstrated on a specific setup that the
purification becomes very efficient by tuning relevant parameters.
