The present invention relates to a circular baler having lower driving noises. More specifically, a noise reducing member made of elastic material is equipped on the outer circumferential surfaces of bearing means installed at particular intervals along the length direction of bale forming chains in order to come in contact with a guide rail, so that contact noises generated when the circular baler is operated are reduced and the breakdown of bearings caused by shock from contact with the guide rail can be prevented. The circular baler of the present invention comprises the following parts: a baling room having an accommodating space for fodder crops therein； and a coupling unit which entangles and compresses fodder crops collected in the baling room in order to be circularly coupled. The coupling unit comprises the following: a pair of bale forming chains which are respectively installed at the left and right edges of the baling room and have a partial section which moves along a circular trajectory with a particular radius based on a central line, which is horizontal in respect to the left and right extended direction of the baling room； multiple coupling rollers which have both ends supported by the bale forming chains and are installed to be separated from each other in the length direction of the bale forming chains； multiple bearing means which are installed at particular intervals along the length direction of the bale forming chains； and a guide rail which is respectively installed at the left and right edges of the baling room and comes in contact with the bearing means so that the bale forming chains are guided and moved in a partial section. The bearing means comprise noise reducing members made of elastic material that come into contact with the guide rail.본 발명은 저소음 구동이 가능한 원형 베일러에 관한 것으로, 보다 상세하게는 베일형성체인의 길이방향을 따라 일정 간격으로 설치되어 안내레일과 접촉되는 베어링수단의 외주면에 탄성을 갖는 소재로 이루어진 소음저감부재를 구비하여 원형 베일러의 구동시 발생되는 접촉 소음을 저감시키고, 안내레일과의 접촉 충격에 의한 베어링의 파손을 방지할 수 있는 저소음 구동이 가능
