A man pushed a woman to the ground at a Brisbane bus station when she confronted him after he inappropriately touched her during the Tuesday evening rush-hour, according to police.

CCTV cameras captured the incident and police have released the vision in the hope of identifying the man responsible for the brazen act.

Police said the 18-year-old woman was fondled by the man at the Cultural Centre bus station in South Brisbane about 5.30pm as he walked past with a group of men.

When the victim challenged the man he can be seen turning around and shoving her to the ground before walking off across the Victoria Bridge towards the Brisbane CBD.

The woman was physically uninjured.

The man has been described as Caucasian, with a large tattoo on his left calf, wearing aqua shorts, an aqua shirt with white stripes, a red hat and white shoes.

Anyone with information should contact Policelink on 131 444 or Crime Stoppers on 1800 333 000.