A novel preventive and/or therapeutic medicament for a constipation predominant IBS which contains as the active ingredient a thieno[3,2-b]pyridinecarboxamide derivative represented by the formula (I): wherein R1 and R2 each independently represents hydrogen atom or a lower alkyl group and A represents a substituent selected from the group consisting of 1-azabicyclo[3.2.2]nonyl group 1-azabicyclo[2.2.2]octyl group, and the N-oxides thereof, a pharmaceutically acceptable salt thereof, or a solvate or hydrate thereof.