Police are hunting for a man who dragged an elderly woman along the ground during a robbery in Perth's southern suburbs.

Rockingham Detectives are investigating the robbery on the 84-year-old woman in the Kwinana suburb of Calista on Monday.

The woman's handbag was taken during the robbery. Credit:Virginia Star

It happened at about 11.45am as the woman was walking along Bright Road.

Police say a man approached her before grabbing her handbag and attempted to pull it from her.