To provide a discharge conveyor control device in a crushing machine capable of preventing breakage of a conveyor belt and a hydraulic motor for a discharge conveyor when the discharge conveyor for conveying stuff crushed by a crushing device is in an overload condition.

The control device has a pressure sensor for detecting the drive pressure of a hydraulic motor 18 for a discharge conveyor, and performs the drive control of the hydraulic motor 18 for the discharge conveyor. The overload of the discharge conveyor is determined based on the drive pressure of the hydraulic motor 18 for the discharge conveyor to be detected by the pressure sensor. If the overload is determined, the overload discharge conveyor stop control for stopping the hydraulic motor 18 for the discharge conveyor is performed.