Canon Michael Ainsworth, 57, was injured by two Asian youths at the church, in Tower Hamlets, east London.
Canon Ainsworth said a third youth watched as he suffered cuts, bruises and black eyes in the assault at the church of St George-in-the-East.
The youths also jeered at the priest for being a churchman in the attack on Wednesday night, the Met Police said.
An appeal for witnesses has been made.
Source: BBC (English)