The claim was made in a sworn Statement by Mark Lucovsky, a former Microsoft employee who quit for Google in 2004.
Microsoft Chief Steve Ballmer has denied the claims, saying they are a "gross exaggeration of what actually took place".
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The statement is the latest salvo in a bitter legal Battle between the firms.
In his Sworn Statement, Mr Lucovsky - a key Windows architect - alleged that Mr Ballmer hurled a chair across the room when he informed him he was moving to Google, before launching into an abusive tirade against Google's Chief Executive Eric Schmidt.
However, Mr Ballmer has dismissed the claims.
"Mark's decision to leave was disappointing and I urged him strongly to change his mind. But his characterisation of that meeting is not accurate," he said in a statement.
For more source: bbcnews
