Afridi was replaced by senior batsman Misbah-ul-Haq for the tour of Ireland.
"It is the board's right to change the captain and the decision was taken in the best interests of the team." Butt said in response to mounting criticism over his decision to sack Afridi as captain for the two-match series against Ireland later this month.
"Captains are changed all over the world and no cricket board gives a reason for that," he told the "Express Tribune" daily newspaper.
"We did what we thought was best and don't need to give a reason for it."
He also defended his decision to appoint Misbah saying that lack of options in the squad forced the move.
"We're looking at everyone's performance and discipline and we're trying to pinpoint a suitable candidate for the captain's position for the future," he explained.
Shahid Afridi's refusal to stay away from the media cost him the captaincy of Pakistan's ODI team as board officials said the all-rounder did not take warnings to keep "internal matters" to himself seriously.
Although some former Test players and administrators have criticised PCB Chairman Ijaz Butt for his decision to change appoint Misbah-ul-Haq as captain for the series against Ireland, insiders in the board said there were enough reasons for action.
"There were a number of factors involved in Butt's decision to remove Afridi as captain but the main reason was his refusal to listen to board warnings about repeatedly going to the media with internal matters," one official source said.
He said even before the ICC World Cup, Butt was not very keen on having Afridi as captain after a number of incidents and that is why the announcement of the captain was delayed.
