OBJECTIVE: To study the relationship between liquid gastric emptying time and different types of chronic gastritis in children. METHODS: Sixty one cases of chronic gastritis were diagnosed by the gastroscope and they were divided into three types according to the pathologic changes under the gastroscope: simple congestive edema gastritis (CEG), gastritis companying duodenal bulb erosion (GDBE) and gastritis companying bile reflux (GBR). Fifteen children who had no pathologic changes under the gastroscope were used as the controls. Liquid emptying time was detected with real time ultrasonography. RESULTS: Except in GDBE, gastric emptying time in CEG [( 92.0 ± 10.1 ) min] and GBR [( 120.6 ± 13.6 ) min] was remarkably prolonged compared with the normal controls [( 52.8 ± 8.3 ) min](P< 0.01 ). CONCLUSIONS: Liquid gastritis emptying time in children with chronic gastritis is correlated to the pathologic changes under the gastroscope. Determining liquid gastritis emptying time might be useful in selecting drugs and estimating curative effects in the treatment of different types of chronic gastritis.