The formaldehyde capture process is investigated by a titanium ion (Ti4+)-based porous coordination polymer (PCP), MIL-125-NH2. This framework contains aromatic amino groups on the pore surface, which effectively capture formaldehyde. The removal efficiency and regeneration properties of MIL-125-NH2 are better than the conventional amine-impregnated activated carbon, and the material does not degrade even after >140 adsorption/desorption cycles.