15 October 2016 Last updated at 13:56 BST
One speaker said the SNP was the "party of compassion" and she urged the conference to back the resolution.
Another delegate said now was not the time to decriminalise cannabis and to audience boos she asked fellow party members to reject the call for change.
Delegates to the SNP conference speak passionately about whether cannabis should be decriminalised for pain relief use.