An endoscopic instrument adapted to engage the stomach tissue and/or the esophagus tissue of a patient from the inside and/or outside thereof is provided. The esophagus being a substantially tube shaped tissue leading to the stomach comprising stomach tissue, the esophagus having an esophagus center axis, being substantially aligned with a cranial-caudal axis of the patient and having a substantially circular circumference substantially aligned with a horizontal plane of the patient, the esophagus further having an inner and outer substantially cylindrical surface extending radially in relation to the esophagus center axis, wherein said instrument is adapted to deliver at least one fixating member, such that said at least one fixating member engages at least the stomach tissue.
