Abstract: An electrical actuator device for opening and closing doors and windows having an openable frame between a closed position and a ventilation or tilted position comprises an electric drive unit with a reversible motor and associated transmission. The drive unit is accommodated within a housing on a frame member serving to receive a locking mechanism, and the transmission functionally engages a locking mechanism mounted in the frame member and a transfer element, respectively, which by means of a coupling fixture is connected with the main frame, the transmission having a first engagement member and a second engagement member for engaging a first carrier member and a second carrier member, respectively.