The robbery happened at 5:45 p.m. on November 20th in an office building at 4445 Holden Street.
Surveillance video released by police shows the victim trying to get off the elevator, but the suspect stands in his way.
The victim appears to shove the robbery suspect out of the elevator. Police say there was a struggle, and that victim was robbed of $836 in cash.
The robber then fled down a fire escape.
The victim was not hurt.
Anyone with information is asked to contact Philadelphia Police.