For election to the post of Prime Minister Pashinyan must receive at least 53 votes in Parliament.
On April 23, at 16:00, Prime Minister Serzh Sargsyan resigned as widespread protests entered the 11th day.
Ararat Mirzoyan, representative of Armenia's Yelq opposition faction, has put forward the candidacy of the faction's leader Nikol Pashinyan for the post of prime minister, RIA Novosti news agency reported.
"It is very important to enhance the effectiveness of the mechanism of property declaration by officials, since now this mechanism gives them room for hiding information about property", Pashinyan said.
"They will sign their own political death sentence", he told AFP. "We can't take this anymore".
However, local media outlets reported early on Tuesday that the sole candidate for the post has announced in a video message posted on his Facebook page that the Republican deputies have chose to thwart the scheduled vote.
"The Republican Party leadership is clinging to power and opposes Pashinyan's election". "Get sober until it's too late, because your behaviour could cause a political tsunami". Sargsyan was appointed PM by the parliament on April 17 but was forced to resign under public pressure less than a week later. The opposition saw the move as aimed at keeping Sargsyan in power indefinitely.
Three of the four parties said that today, on 1 May, they would vote for him as the next prime minister of Armenia.
Addressing tens of thousands of people gathered in a square in the Armenian capital, Nikol Pashinyan said that starting from 8:15 (0415 GMT) on Wednesday morning, his supporters would block roads, railways and airports.
Before the vote, lawmakers grilled Pashinyan during a question-and-answer session. "Even if some are happy in Azerbaijan, I think they assess the situation not properly", added Pashinyan.
Baghdasarian's announcement and the vote was assailed by angry shouts and waving fists from thousands of people who stood in central Yerevan's Republic Square throughout the day watching the parliamentary proceedings on a large screen television. Some said Pashinyan does not have a program to offer the country.