Endometriosis surgery is performed laparoscopically. It’s a complex surgery requiring surgical experience and the regular practice of complex cases at a referral center. Unlike a pelvic MRI, which can be reinterpreted, surgery is a closed-door process between the surgeon and their assistant, and it might involve the anesthesiologist. The operative report is therefore a fundamental control document. First and foremost, the operative report must inform the patient and any other healthcare professionals of who may be involved in the patient’s care. The patient expects an extensive description of the lesions and of the surgical procedures. The surgeon must therefore aim to make this document intelligible. The other issue concerns the standardization of data collection in the interests of research. Laparoscopy is the gold standard for the phenotypic evaluation of the disease, and lesion descriptions must be standardized and reproducible. The use of a single lexicon, following a consensual plan, and combining those with the use of classifications, scores, or staging validated by the scientific community should improve our knowledge of the disease while improving the flow of information. Consensus among endometriosis societies has been reached on the lexicon to be used to designate anatomical structures, how the peritoneal cavity should be explored, and the vocabulary to be used by the surgeon. The aim of this chapter is to summarize these data in a standardized operative report.