To provide a feeding conveyor for use in a self-propelled processing machine which can reduce the excessive consumption of lubrication oil fed to a roller shaft of a conveyor chain present in a feeding conveyor.

The feeding conveyor for use in a self-propelled processing machine is characterized that a high speed switching electromagnetic valve 64 for supplying a hydraulic fluid coming from a hydraulic pump to a switching valve, a lubrication oil feed pipe 50 disposed on the roller shaft of the conveyor chain present in the feeding conveyor, a lubrication oil storage tank 55 connected to the lubrication oil feed pipe 50 via a distribution pipe, an electromagnetic on-off valve 56 for feeding lubrication oil disposed in the distribution pipe, an oil pressure sensor 68 for detecting the pressure of the hydraulic fluid supplied to the hydraulic motor from the switching valve, and a controller 69 that obtains a detected value from the oil pressure sensor and when the detected value is equal to or higher than a predetermined threshold, outputs a switching signal of switching to a high speed switching position to the high speed switching electromagnetic valve 64 and further outputs an opening command signal to the electromagnetic on-off valve 56 for feeding the lubrication oil.