A bead core coating method for coating an annular bead core with a belt-shaped rubber sheet including the steps of: winding the rubber sheet extruded on an outer circumferential surface of a rotary drum; sticking a part of the rubber sheet to an outer surface of the bead core which is in rotation; and winding a remaining part of the rubber sheet stuck on the outer surface of the bead core while sequentially sticking the remaining part along the outer surface of the bead core, wherein air is blown to a sheet portion including the end that is not stuck to the outer surface of the bead core in the currently-winding rubber sheet in a first direction toward the end along a sheet surface or a second direction inclined toward an outer surface side of the bead core as compared with the first direction.