To provide a register for air-conditioning good in directivity of air-conditioning air blown out.

The register for air-conditioning is provided with a register panel 1 having a blowing port 10; and a cylindrical retainer 2. An end on the register panel 1 side of the retainer 2 has at least one of an upper surface wall part 210 for dividing an upper surface of a ventilation passage and having an upper surface displaceable between the state in which the ventilation passage is contracted in diameter near the blowing port 10 and the state in which it is enlarged in diameter, a lower surface wall part 220 for dividing a lower surface of the ventilation passage and having a lower surface displaceable between the state in which the ventilation passage is contracted in diameter near the blowing port and the state in which it is enlarged in diameter, and a pair of side surface wall part for dividing a pair of side surfaces of the ventilation passage and having respective side surfaces displaceable between the state in which the ventilation passage is contracted in diameter near the blowing port and the state in which it is enlarged in diameter. According to the register for air-conditioning, directivity of the air-conditioning air blown out from the blowing port is enhanced.