Inclusion Criteria:  Adults between 19 and 75 years old based on the date of written agreement Those who have been diagnosed with erosive esophagitis of LA Grade A-D on the upper gastrointestinal endoscopy Those who experienced symptoms of heartburn or acid regurgitation within the last 7 days  Exclusion Criteria:  Those who have undergone gastric acid suppression or gastric, esophageal surgery Those who with clinically significant liver, kidney, nervous system, respiratory, endocrine, hematologic, cardiovascular, urinary system disease