The purpose of this study is to evaluate the safety and efficacy of KWA-0711 in Chronic Constipation (CC) patients.

Inclusion Criteria:

• The patients who experienced fewer than three Spontaneous Bowel Movements (SBMs) per week for more than 6 months prior to the enrollment
• The patients who experienced one or more of the following signs or symptoms during more than 25% of bowel movements for more than 6 months: straining, lumpy or hard stools, and a sensation of incomplete evacuation

Exclusion Criteria:

• Patients who have secondary constipation caused by systemic disorder
• Patients who have organic constipation
• Patients who received intestinal resection