Atrial septal defect transcatheter occlusion techniques have become an alternative to surgical procedures. With the increasing use of this new technology, several complications have been identified. The authors present the case of a patient who was admitted to the hospital for primary percutaneous closure of a secundum atrial septal defect. On routine follow-up examination 24 hours after implantation, transthoracic echocardiography revealed a partial dislocation of the occluder into the right atrium. The patient was referred for cardiosurgical treatment. Strict selection criteria and the choice of the device may help reduce the incidence of complications such as dislocation of the occluder into the right atrium following the percutaneous device closure of an atrial septal defect.