The former Argentina international has made the decision to throw in the towel after he lost his calm and attacked a supporter
Quilmes coach Nelson Vivas has handed in his resignation after punching a fan in a 1-1 draw with Atletico Rafaela on Friday.
The 44-year-old had to be restrained by police after turning on one of his club's supporters during the match and has now opted to step down from his post as a result.
"I'm not a violent person but I realise that's not the image a trainer should give," Vivas told reporters after resigning.
Quilmes president Anibal Fernandez said that Vivas was aware of his mistake but that he had no choice but to accept his resignation.
"He came to my office and handed in his resignation. He knows he put his foot in it and realises the situation is uncomfortable for the team and regrets his actions," he told Radio La Red.
"We're trying all means to curb violence [in football in Argentina] and he can't commit such an error."
Vivas, who represented Arsenal and Inter during his active career, only took the job at Quilmes at the start of the season.
Quilmes are 16th in the Argentina Primera Division, with just one win in their last seven league games.