Rally participants in Batumi are chanting 'Freedom to Misha' and 'No to Rigged Elections.'
Opposition leaders are making speeches at the rally site.
LEOs are at the scene.
Opposition rallies were sparked by ex-president Mikheil Saakashvili's detention and self-government election results in Tbilisi and other municipalities.
Representatives of opposition parties also plan to stage a rally in Tbilisi on 6 November.
Mikheil Saakashvili, who was detained on 1 October, has been on a hunger strike for 33 days now.