The Latics, who were FA Cup winners just 18 months ago, have decided to act after a run of just one win since August saw them drop into the second tier's bottom three.
Last Friday night's 3-1 defeat at local rivals Bolton, which saw Wigan concede three times in 11 second-half minutes, left Rosler "embarrassed" and he accused his players of "giving up" in what proved to be the final match of his 11-month reign.
"I have thought long and hard about this,” said Wigan owner Dave Whelan in a statement on the club's website.
"I have thought about little else for days in fact. Initially my thoughts were that Uwe should be given more time. He is a good manager and I like him immensely as a person, he is honest, passionate and clearly works day and night to try and earn success for the team.
"Following the incredible achievements of last season, I felt it was the right thing to do that he should be given more time. However, the situation we find ourselves in at the moment, and the run of results in recent months, really has been alarming.
Dave Whelan on Uwe Rosler's exit "Something is clearly not working. For whatever reason, the team is not gelling, despite substantial financial backing in the summer and the dressing room being blessed with a huge amount of quality."
Dave Whelan on Uwe Rosler's exit
"Therefore, I have now come to the reluctant conclusion that for the long term good of the club, we need a change.
"Uwe is a good man and a good manager and he will bounce back, I am sure of that. We thank him for his efforts with us, I could not have wished to appoint a more committed and hard-working manager and we sincerely wish him all the best in his future career.
"But now the search begins immediately for a replacement.”
Wigan have confirmed assistant manager Graham Barrow will take temporary charge of the first team, assisted by first team coach Eric Black, in the build-up to the next game, against Middlesbrough on November 22.
Next Wigan manager odds!
Former Cardiff boss Malky Mackay is the early favourite with Sky Bet to become the new manager at the DW Stadium.
MK Dons chief Karl Robinson, ex-Wigan boss Paul Jewell and former Crystal Palace and Stoke manager Tony Pulis are also early names in the frame.
Uwe Rosler leaves Wigan
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