Karlygash Zhaqiyanova said her husband was paroled after judges rejected a prosecutor's appeal against Zhaqiyanov's early release.
Zhaqiyanov was jailed on charges of abuse of office shortly after founding the Democratic Choice of Kazakhstan movement in November 2001. While he was in prison the movement transformed itself into a political party, but last year a court ordered the party disbanded for making anticonstitutional statements.
Zhaqiyanov and his supporters claimed the charges against him were politically motivated.
The opposition For A Just Kazakhstan bloc, which called for Zhaqiyanov's release, said he would return to Almaty on 15 January.
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