An office worker was lucky to escape uninjured after a large sheet of glass fell from a building and landed on him.

The man was walking along Riverside Quay at Southbank when the glass fell about 2.30pm Thursday.

A Sky News reporter told radio station 3AW the man was hit on his back and leg.

Smashed glass was left laying on the footpath as the area was blocked off.

Victoria Police and Ambulance Victoria were not called to the incident.