A bearing unit comprises a shaft, a radial bearing for supporting the
shaft in a peripheral rotation direction of the shaft, a thrust bearing
supporting an end of the shaft in a thrust direction of the shaft, a
housing made of a molded body of a synthetic resin, inside of which
housing the radial bearing and the thrust bearing are arranged, the
housing having a sealed configuration except for a shaft insertion hole,
through which the shaft is inserted, a slip-out preventing member
provided on an end side of the radial bearing at which the thrust bearing
is provided, the slip-out preventing member preventing the shaft from
slipping out from the radial bearing, and a viscous fluid filled in the
housing. The slip-out preventing member is made of a material having a
thermal deformation temperature higher than a temperature applied to the
slip-out preventing member upon molding of the housing.