Radhakisan Jaiswal surrendered before the police, inspector Prashant Yadav of Vijay Nagar police station said.
Jaiswal allegedly slapped additional municipal commissioner Rohan Saxena during a protest over closure of a service lane near Radisson square here on June 16. He fled from the spot after the incident.
BJP corporator Saroj Chauhan, her husband R Chauhan and five others were earlier arrested in connection with the incident.