An electrical door opener, including • a pivot latch, which - is supported to be pivotable between an unlocking location and an interlocking location, and - is adapted • in the interlocking location, to be brought into engagement with a corresponding part of a swing leaf, which is in a closing location, in such a manner that an opening movement of the swing leaf is prevented and • in the unlocking location, to be pivoted out of engagement from the corresponding part, such that the opening movement of the swing leaf is released, • a catch lever, which - is supported to be pivotable around a first axis towards the pivot latch in the arresting location and away from it into the un-arresting location, - in the arresting location, prevents a pivoting of the pivot latch from the interlocking location in the direction of the unlocking location, • a stop anchor, which - is supported to be pivotable around a second axis towards the catch lever in blocking location and away from it in the release location, and - in the blocking location, prevents a pivoting of the catch lever from the arresting location in the direction of the un-arresting location, as well as • an electro-magnet, adapted upon actuation to urge, respectively to move the stop anchor electro-magnetically in the direction of the release location, respectively in a direction opposite thereto, characterized in that the door opener is configured in that the stop anchor, in the blocking location, is prevented from changing the blocking location thereof with regard to the rest of the door opener during a further pivoting of the catch lever out of the arresting location in the direction of the pivot latch and back again. • a pivot latch, which - is supported to be pivotable between an unlocking location and an interlocking location, and - is adapted • in the interlocking location, to be brought into engagement with a corresponding part of a swing leaf, which is in a closing location, in such a manner that an opening movement of the swing leaf is prevented and • in the unlocking location, to be pivoted out of engagement from the corresponding part, such that the opening movement of the swing leaf is released, - is supported to be pivotable between an unlocking location and an interlocking location, and - is adapted • in the interlocking location, to be brought into engagement with a corresponding part of a swing leaf, which is in a closing location, in such a manner that an opening movement of the swing leaf is prevented and • in the unlocking location, to be pivoted out of engagement from the corresponding part, such that the opening movement of the swing leaf is released, • in the interlocking location, to be brought into engagement with a corresponding part of a swing leaf, which is in a closing location, in such a manner that an opening movement of the swing leaf is prevented and • in the unlocking location, to be pivoted out of engagement from the corresponding part, such that the opening movement of the swing leaf is released, • a catch lever, which - is supported to be pivotable around a first axis towards the pivot latch in the arresting location and away from it into the un-arresting location, - in the arresting location, prevents a pivoting of the pivot latch from the interlocking location in the direction of the unlocking location, - is supported to be pivotable around a first axis towards the pivot latch in the arresting location and away from it into the un-arresting location, - in the arresting location, prevents a pivoting of the pivot latch from the interlocking location in the direction of the unlocking location, • a stop anchor, which - is supported to be pivotable around a second axis towards the catch lever in blocking location and away from it in the release location, and - in the blocking location, prevents a pivoting of the catch lever from the arresting location in the direction of the un-arresting location, as well as - is supported to be pivotable around a second axis towards the catch lever in blocking location and away from it in the release location, and - in the blocking location, prevents a pivoting of the catch lever from the arresting location in the direction of the un-arresting location, as well as • an electro-magnet, adapted upon actuation to urge, respectively to move the stop anchor electro-magnetically in the direction of the release location, respectively in a direction opposite thereto,