PROBLEM TO BE SOLVED: To suppress outflow of a lubricant for an oil-lubricated bearing.SOLUTION: A lubricant outflow inhibiting device is intended for a rotary machine including a main shaft extending in an axial direction, and a bearing that rotatably bears the main shaft and uses a lubricant. The lubricant outflow inhibiting device includes: a bearing cover that covers one side of the bearing and is provided with a through hole allowing the main shaft to pass therethrough in the axial direction; and an oil cover disposed apart from the main shaft so as to surround the circumference of the main shaft between the bearing and the bearing cover.
