An electric push bar assembly includes an electric push bar including a retractable tube and a connector, and a release mechanism including a connection socket connected to the retractable tube, a fixed socket connected to the connector, a clutch socket axially slidably coupled to the connection socket and having a plurality of engagement tooth blocks respectively engaged with respective engagement teeth of the fixed socket and a rotary operating member mounted around the fixed socket and operable to disengage the engagement tooth blocks of the clutch socket from the engagement teeth of the fixed socket for allowing adjustment of the retractable tube manually.