Provided is a passenger conveyor including a plurality of steps (2) having step rollers (6 and 7), a step chain (8) circulatingly moving in conjunction with each of the plurality of steps (2), guide rails (13a, 13b, 14a and 14b) provided in an intermediate portion of a truss and guiding the step rollers (6 and 7) of each step (2), and an intermediate driving device (12) provided in the intermediate portion of the truss and configured to transmit a driving force to the step chain (8). A step-attitude changing zone (Z) for changing the attitude of each step (2) on a return path side is provided on the traveling path of the steps (2) on the return path side.