The Papuan activist, Bucthar Tabuni, has been sentenced to three years in prison for so-called provocation at a pro-independence demonstration in the Indonesian province last year.
Prosecutors had alleged Bucthar, the chairman of the International Parliamentarians for West Papua, committed treason during the demonstration.
The Jakarta Post said they called for the district court in Jayapura, in Papua, to sentence him to 10 years imprisonment.
Buchtar was arrested in Jayapura last December for allegedly leading a rally to support the launch of the International Parliamentarians for West Papua in London.
However, a three-member panel of judges ruled that Buchtar was not guilty of treason because the anti-Indonesia demonstration had been peaceful.
The judges, however, convicted Buchtar of provocation as evidence indicated he had called out to the crowd phrases such as "autonomy!"and "referendum!"