Abstract: A correction roller support device of a pipe conveyor having an endless transfer belt whose part is rounded off into a pipe shape in which a material to be transferred is enclosed. The support device has at least one correction roller which is obliquely inclined relative to the transfer direction of the transfer belt and adapted to be in pressure contact with the outer circumference of the pipe-shaped transfer belt to give correcting force to the belt for correcting twisting of the belt. The device further has an position adjusting device provided on at least one support plate of a bracket fixed to a support frame of the pipe conveyor for supporting one end of the shaft of the correction roller. The position adjusting device holds the one end of the shaft of the correction roller positionally adjustably, thereby enabling inclined angles of the correction roller to be adjustable.