Rotherham have parted company with manager Alan Knill.
The Millers are 13 points adrift of safety at the bottom of League One after failing to win in their last 14 games.
A club statement said: 'This action was not taken lightly, but it was felt that this was the only option considering our recent plight.'
Mark Robins has been handed responsibility of team affairs for this weekend's game with Bradford on Saturday.
The Millers were hit with a 10-point deduction before the season began after going into administration but began well and climbed to 19th in the table before suffering their slump in form.
The former Rotherham defender was appointed manager in December 2005 for what was his second stint in charge after being appointed caretaker boss earlier that season.
'This is now a time that we all need to pull together, from the fans to the board of directors, we all need to get behind our team and show them our support which will give them that much needed confidence,' the statement added.
'We would like to wish Alan and his family all the best for the future and thank him for all the hard work he has done down at Millmoor.'