The invention provides a scraper conveyor. The scraper conveyor comprises a driving mechanism; the driving mechanism is located in the middle of the scraper conveyor and comprises a chain wheel, a transmission roller and a supporting plate; the supporting plate is located above the chain wheel; the transmission roller is located below the chain wheel; and a scraper chain is arranged to be laid from a loading end to an unloading end through the supporting plate, then be laid to the chain wheel after returning from the unloading end, then return from the chain wheel to be laid to the transmission roller and finally return from the transmission roller to be laid to the loading end so that the scraper chain can form a whole electrodeless closed chain. The scraper conveyor has the advantages that a transmission device is arranged in the middle so that the space requirements of the two ends can be reduced to the minimum, in addition, a driving part in the middle is not fixedly arranged at a certain position and can be arranged at any position in the middle along with increase and decrease of the number of groove bodies; and the multi-layer rotary arrangement of the scraper chain can be realized through the cooperation of the supporting plate and the transmission roller so that enough contact area between the scraper chain and the chain wheel can be guaranteed, and therefore the purpose of driving the scraper chain to operate can be achieved.