The invention is a structural improvement of the enema, which is mainly composed of a catheter through a locking sleeve and an expansion bottle to hold the enema agent, wherein the end of the catheter is provided with a cone-shaped open mouth, and a plurality of locking blocks are arranged in the cone-shaped open mouth ring, while the inner part of the bottom of the expansion bottle is corresponding to a protruding locking rod, so that when the enema agent is injected into the rectum of the catheter and the compression expansion bottle is fully closed, The stopper can be inserted into the stopper to be clamped, so as to prevent the elastic recovery of the expansion bottle from causing the reflux of the enema.本創作係一種灌腸器結構改良，主要係以一導管經由鎖固套結合容納灌腸劑的伸縮瓶所組成，其中導管末端係具有一錐型開放口，且在錐型開放口環設複數卡止塊，而伸縮瓶瓶底內部則是對應凸伸一卡掣桿，俾可在導管對直腸注入灌腸劑而壓縮伸縮瓶完全收合時，令卡掣桿可以穿入卡止塊中受到卡固，防止伸縮瓶彈力回復而造成灌腸劑回流者。
