食道（Esophagus），亦称食管，人和动物消化管道的一部分，上面连接咽，下面连通胃，紧贴脊柱的腹侧，具有输送食物的功能。食道是一条由肌肉组成的中空信道，在最尾端与胃相接的地方有一个括约肌确保胃酸不会逆流至食道中。食道在平时是呈现扁平状，当有食物通过时便会扩大。食物并非靠着地球重力落入胃中，是借由食道壁的肌肉进行像波浪般蠕动，强制将食物推入胃中，此外食道还会分泌一种黏液，让食物可以很容易地通过。

食道若患肿瘤为食道癌。吸烟、嚼食槟榔和重度饮酒会增加诱发的风险。其他相关病理还有胃食道逆流，并可能导致食道炎、食道狭窄与喉咙发炎、咳嗽等。

The esophagus (American English) or oesophagus (British English), commonly known as the food pipe or gullet, is an organ in vertebrates which consists of a fibromuscular tube through which food passes, aided by peristaltic contractions, from the pharynx to the stomach. In humans, the esophagus is usually 18–25 centimetres long. During swallowing the epiglottis tilts backwards to prevent food from going down the larynx and lungs. The esophagus travels behind the trachea and heart, passes through the diaphragm and empties into the uppermost region of the stomach. The word esophagus is the Greek word for gullet.