Today, although the triple treatment with clarithromycin accepted as the primary treatment for Helicobacter pylori infection eradication is well tolerated, the eradication has been decreased to 65 %. However, the eradication resulting from TRIOL treatment with levofloxacin is expected to be 75 % or higher. If the target results can be reached, it will be concluded that TRIOL treatment with levofloxacin will be an alternative to the triple treatment with clarithromycin as the primary treatment.