Fire-retardant sliding door with at least one sliding door leaf (12, 14) in fire protection design, a sliding door guide in fire protection design, within which the sliding door leaf (12, 14) is displaceable in a substantially horizontal direction between an open position and a closed position, wherein the fire-retardant sliding door with the sliding door leaf (12, 14) in the closed position resists a one-sided fire impact for a predetermined period of time, a door drive connectable to a mains power supply for driving the door movement in the opening and closing direction, a normal actuation device for automatically actuating the door drive in normal operation, an energy storage device for storing electrical energy for the door drive in order to supply it with energy even in the event of fire or in the event of a mains power failure, a fire protection function device which is designed in such a way that in the event of fire and in the event of a mains power failure it automatically initiates an incident operation by controlling the door drive in such a way that it moves the sliding door leaf (12, 14) into the closed position and holds it in the closed position, characterized in in that the fire-retardant sliding door has an escape door function actuation device by means of which a person can actuate the door drive separately from the normal actuation device during incident operation in order to carry out an opening and closing cycle of the sliding door leaf (12, 14) from the closed position initiated by the fire protection function device, and wherein the fire protection function device at least partially overrides the normal actuation device to prevent unintentional opening in case of fire. at least one sliding door leaf (12, 14) in fire protection design, a sliding door guide in fire protection design, within which the sliding door leaf (12, 14) is displaceable in a substantially horizontal direction between an open position and a closed position, wherein the fire-retardant sliding door with the sliding door leaf (12, 14) in the closed position resists a one-sided fire impact for a predetermined period of time, a door drive connectable to a mains power supply for driving the door movement in the opening and closing direction, a normal actuation device for automatically actuating the door drive in normal operation, an energy storage device for storing electrical energy for the door drive in order to supply it with energy even in the event of fire or in the event of a mains power failure, a fire protection function device which is designed in such a way that in the event of fire and in the event of a mains power failure it automatically initiates an incident operation by controlling the door drive in such a way that it moves the sliding door leaf (12, 14) into the closed position and holds it in the closed position, characterized in in that the fire-retardant sliding door has an escape door function actuation device by means of which a person can actuate the door drive separately from the normal actuation device during incident operation in order to carry out an opening and closing cycle of the sliding door leaf (12, 14) from the closed position initiated by the fire protection function device, and wherein the fire protection function device at least partially overrides the normal actuation device to prevent unintentional opening in case of fire.