PROBLEM TO BE SOLVED: To provide a bearing device for a tilling depth gauge wheel that can facilitate replacement of lubricant, and a lubricant feeding method for the bearing device for the tilling depth gauge wheel.SOLUTION: A bearing device for a tilling depth gauge wheel by one embodiment of the present invention comprises: a rotary shaft body； bearing members fixed and disposed in one end side of the rotary shaft body； wheel bosses fixed in the bearing member, internally installed in the rotary shaft body, and rotatably disposed in the rotary shaft body； and first oil seals fixed in the wheel boss, slidably coming into contact with the rotary shaft body, and disposed in the one end side with respect to the bearing member. The rotary shaft body has a lubricant supply path drawn out of a gap between the wheel boss and the rotary shaft body.SELECTED DRAWING: Figure 5
