The Study “An Endoscopic Evaluation of Acute Dysphagia Due To Mechanical Obstruction In South Punjab Pakistan” was conducted from January to December 2005. This study was carried out to find the common causes of mechanical dysphagia. 50 cases were screened to see the dysphagia due to the mechanical obstruction.28 (56%) were males and 22 (44%) were females. Foreign body in esophagus was seen in 3 patients (6%) 2 female and one male. Two patients (4%) had esophageal web, both patients were female and upper part of oesophagus was involved in both of them. Two (4%) patients have normal esophagus but carcinoma stomach was causing dysphagia and both of these patients were males. Lower third of oesophagus was the commonest site of involvement (62.5%), middle one third was involved in 31.25% of cases while upper third was involved in only 1 patient (6.25%). Carcinoma oesophagus was predominantly found in males and lower one third was the commonest site (71.4%).