Local authorities and health services in Devon are being advised on how to spot the signs of someone being exploited.
The conference, at Sandy Park, aims to raise awareness of the issue in Devon.
Devon and Cornwall's Chief Constable Shaun Sawyer, who's the national policing lead for modern slavery, is co-hosting the event.
Police hope increased reporting of the crime will lead to offenders being brought to justice and victims receiving the care they need.
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