Drive device for a fire-proof door provided with a fire-proof door leaf and a door frame with a door guide for the fire-proof door leaf, wherein the drive device comprises a closing mechanism, wherein the closing mechanism is provided with: a driver movable between an open position and a closed position for driving the fire-proof door leaf into a closed position, a preloading means for preloading the driver into the closed position, and a locking device which locks the driver in the open position against the preload of the preloading means and can be released to close the fire-proof door in the event of fire, characterized in that the drive device is further provided with a door drive for automatically driving the fire-proof door leaf when the driver is locked by means of the locking device, the door drive comprising a door drive output element to be connected to the fire-proof door leaf, a motor drive unit, and a door drive emergency release operable by an actuating movement for decoupling the door drive output element from the motor drive unit, and in that the closing mechanism is further provided with a door drive emergency release actuating means connected to the door drive emergency release of the door drive for actuating the door drive emergency release of the door drive in the event of a fire and/or upon release of the locking device, in that the door drive emergency release actuating means is designed for arrangement on the fire-proof door leaf or on the driver or is stationary and has an actuating gear unit for converting a relative movement between the driver and the fire-proof door leaf into the actuating movement for actuating the door drive emergency release device, in that the actuating gear unit has a rocker or a lever for picking up the relative movement and a pulling means and/or a Bowden cable for transmitting a lever movement to the door drive emergency release of the door drive and in that the actuating gear unit is preloaded into a non-actuating position and can be moved into an actuating position against the preload by the relative movement between the driver and the fire-proof door leaf. a driver movable between an open position and a closed position for driving the fire-proof door leaf into a closed position, a preloading means for preloading the driver into the closed position, and a locking device which locks the driver in the open position against the preload of the preloading means and can be released to close the fire-proof door in the event of fire, characterized in that the drive device is further provided with a door drive for automatically driving the fire-proof door leaf when the driver is locked by means of the locking device, the door drive comprising a door drive output element to be connected to the fire-proof door leaf, a motor drive unit, and a door drive emergency release operable by an actuating movement for decoupling the door drive output element from the motor drive unit, and in that the closing mechanism is further provided with a door drive emergency release actuating means connected to the door drive emergency release of the door drive for actuating the door drive emergency release of the door drive in the event of a fire and/or upon release of the locking device, in that the door drive emergency release actuating means is designed for arrangement on the fire-proof door leaf or on the driver or is stationary and has an actuating gear unit for converting a relative movement between the driver and the fire-proof door leaf into the actuating movement for actuating the door drive emergency release device, in that the actuating gear unit has a rocker or a lever for picking up the relative movement and a pulling means and/or a Bowden cable for transmitting a lever movement to the door drive emergency release of the door drive and in that the actuating gear unit is preloaded into a non-actuating position and can be moved into an actuating position against the preload by the relative movement between the driver and the fire-proof door leaf.