To provide a lighter, inexpensive and compact roller conveyor for feeding carried objects over a long distance only by slightly footing an input pedal and releasing it without requiring electric power at all.

When a worker foots a pedal portion 10a of the input pedal 10 and releases it, a coil spring shrunk once is elongated while releasing accumulated elastic energy to push the input pedal 10 up, a rack gear 12 is moved up integrally with the input pedal 10 to rotate a pinion gear 13, a first sprocket 14 is also subjected to rotation to be transmitted to a second sprocket 16 via a chain 15, the second sprocket is also rotated, and as a result a driving shaft 6a is also rotated. Thus, a driving sprocket 6 is rotated and further rotated several times with the inertial force of the weight of a balanceweight to make a driving chain 7 travel at a long distance and give a number of rotations to a driving roller 3A so that the carried objects placed on carrying rollers 3A, 3B are carried to a support 9 at a time.