Abstract: A low-profile air-conditioning register includes a retainer, an upstream fin, and downstream fins. The downstream fins include two facing first downstream fins extending in a longitudinal direction and two facing second downstream fins extending in the longitudinal direction of the first downstream fins on an upstream side of the first downstream fins. The low-profile air-conditioning register includes a downstream transmission mechanism. When one of the first downstream fins is tilted toward a tilt position, the downstream transmission mechanism holds, at a neutral position, an other one of the first downstream fins and one of the second downstream fins located at a diagonal position with respect to the other one of the first downstream fins and tilts, toward the tilt position, one of the second downstream fins located at a diagonal position with respect to the one of the first downstream fins.