To provide a compact bearing device excellent in lubricating performance.

In a bearing device having a bush for housing a corresponding journal, being used to support a rotary member periodically changing in the size and the direction of a load from outside, having the pressure receiving surface of the bush forming clearance narrowing in a wedge shape toward a support area together with the pressure receiving surface of the journal, having a clearance position periodically changing by the load and supplying lubricating oil to the clearance through bush side lubricating oil passages 11, 13, 12, at least a single lubricating oil passage 12 is arranged in an area having a dangerous area where angular velocity of the clearance corresponds to an almost half of angular velocity of the journal, and is constituted so that an opening cross section on the opposite side of a groove of the lubricating passages is smaller than a groove side opening cross section, and an inside dimension of the groove side opening part corresponds to a groove width.