A passenger boarding bridge comprises: a walkway section which is provided at an outer tunnel of adjacent tunnels, and is movable between a walkway position and a non-walkway position located under the walkway position; and a plurality of rotary members arranged along the lengthwise direction of the outer tunnel, each of the plurality of rotary members being rotatable around a vertical rotation axis between a first rotation position at which the rotary member supports an end portion of the walkway section while at the walkway position and a second rotation position at which the rotary member does not support the end portion. In a case where at least one of adjacent rotary members of the plurality of rotary members is at the second rotation position, the adjacent rotary members partially overlap with each other when viewed in the width direction of the walkway section or in the vertical direction.