Oil rotary vacuum pump

The invention provides an oil rotary vacuum pump ensuring lubricating property of a bearing part without use of a high self-lubricating solid lubricating material. The oil rotary vacuum pump is provided with a main body, a cylinder seat, a rotation member, a driving part, and a sliding bearing. The main body is provided with an oil box part storing pump oil. The cylinder seat is provided with a pump chamber and a lubrication line, and the lubrication line makes the pump oil communicated between the oil box part and the pump chamber. The rotation member is rotatably disposed in the pump chamber, and is provided with a sliding part capable of sliding on the inner surface of the pump chamber. The driving part is installed on the main body and provided with a rotation shaft rotating the rotation member. The sliding bearing is disposed on the cylinder seat and rotatably supports the rotation shaft. The sliding bearing is provided with a channel communicated with the lubrication line.