To provide a conveyor capable of exactly judging the presence or absence of an object to be handled.

An automatic guided vehicle 200 conveys the object W to be handled up to the vicinity of the conveyor 100, and mounts the object W on a plurality of rollers 2 of the conveyor 100. At this time, a straddle leg 212 of the automatic guided vehicle 200 is in contact with a lever 4 of a stopper driving means 3. Since the lever 4 is moved (rotated) by the contact, a stopper 6 rises up to upper sides of the rollers 2 via a connecting part 5 of the stopper driving means 3. As a result, the object W mounted by the automatic guided vehicle 200 does not move on the plurality of rollers 2 by its self weight and is stopped by the stopper 6. The presence or absence of the object W therefore can be detected within prescribed time by a sensor.