Abstract: A constant feed supplying device having a desired number of flow paths for supplying a feed to a desired number of cages. A discharge port is operatively connected to a feed hopper for transferring the feed introduced into the flow path towards a discharge port and continuously dropping the feed through the discharge port. The discharge port includes a rotary disk mounted for rotation in a sliding contact with the bottom of the flow path. The rotary disk includes a number of through holes provided at suitable intervals so that the through holes may be sequentially brought into position over the discharge port during rotation of the disk. Each flow path is provided with a rotary shaft positioned horizontally within the flow path and projecting out of the flow path so as to be operable by a suitable rotary mechanism.