A door coordinator includes a base fixed to a mounting face of a door frame to which inactive and active doors are pivotably mounted. A pivotal member includes an axle pivotably mounted to the base. A first arm extends from an end of the axle. A shorter second arm is formed on the other end of the axle. A buffering wheel and a guiding wheel are rotatably mounted to the first and second arms, respectively. A pressing bolt is threadedly engaged in a screw hole in a rear end of the second arm. The pressing bolt is rotatable relative to the second arm to adjust a length of an exposed section of the pressing bolt outside of the screw hole, such that a height of each of the buffering wheel and the guiding wheel in a vertical direction relative to a longitudinal axis of the axle can be adjusted.