Ain Shams Misdemeanour Court has upheld activist Asmaa Mahfouz's sentence of one year in prison plus a LE2000 fine for assault. Mahfouz was sentenced in absentia on 7 March, but had appealed against the ruling.
Mahfouz has stated that she has lodged a second appeal that will be heard on 12 June.
Mahfouz is accused of assaulting civil servant Abdel Aziz Fahmy.
The former April 6 Youth Movement member, Mahfouz, denies having ever met Fahmy. She claims that the case is politically motivated and designed to ruin her reputation as an activist.
Fahmy on the other hand claimed Mahfouz attacked him for his support of the Supreme Council of the Armed Force (SCAF), to which she is opposed.
Mahfouz had told Al-Ahram daily in March that Fahmy is the same man who previously filed cases against political activists Alaa Abdel-Fattah and Ahmed Abou-Doma.
On the eve of the January 25 Revolution Mahfouz made a video that went viral on YouTube calling on Egyptians to take to the streets.
The female political activist accuses the Supreme Council of the Armed Forces (SCAF) of being behind the case.