SELF-LUBRICATION-TYPE BEARING DEVICE

PROBLEM TO BE SOLVED: To provide a miniaturizable self-lubrication-type bearing device with a simple constitution, using parts of inexpensive procuring cost to enhance the competitiveness of cost. SOLUTION: This bearing device is mounted on a driving shaft 3 of a feed pump for self-lubrication by lubricant, and provided with a radial bearing 21 and a thrust ball bearing 22 supporting one shaft end of the driving shaft 3, a bearing housing 25 including the radial bearing 21 and the thrust ball bearing 22 inside and fixed to the feed pump, a large disc part 27 mounted on the driving shaft 3 in the bearing housing, an endless groove 28 formed inside of the bearing housing 25 along a peripheral face of the disc part 27, an oil reservoir mounted inside the bearing housing 25 for reserving the lubricant to be fed to the groove 28, and an oil feed passage formed from the oil reservoir to the groove 28, from the groove 28 to each bearing, and further from the bearings to the oil reservoir.