Thousands of protesters marched against the Nagorno-Karabakh peace agreement and also lit candles in honour of those killed in the conflict during a memorial at the central Freedom Square in Yerevan on Saturday.
The fifth day of protests began with the lighting of candles, before the protesters marched through the city.
Thousands of people have been rallying against the peace agreement in the Armenian capital every day since Tuesday.
Armenia and Azerbaijan signed a Russian-brokered deal to end fighting in the disputed region on Monday.
The agreement sees Azerbaijan obtaining control of the territory it has taken in the most recent fighting, with Armenia ceding further territories in the coming month.