To provide a device for detecting the full of a chute, assuring detection of a chute full condition even in circumstances susceptible to rusting and dust accumulation.

The device for detecting the full of the chute comprises a movable plate for blocking an opening to a chute side wall and a proximity sensor for detecting the turn of the movable plate and detecting an approximately chute full condition, the movable plate 23 having a band portion 23, formed of a elastically easy-to-bend material, near a suspension shaft 21.