A bead core coating method for coating an annular bead core with a belt-shaped rubber sheet, the bead core coating method comprising the steps of: winding the rubber sheet extruded through a mouthpiece by an extruder on an outer circumferential surface of a rotary drum from a leading end of the rubber sheet; sticking, from the leading end, a part in a width direction of the rubber sheet existing on the outer circumferential surface of the rotary drum to an outer surface of the bead core which is in rotation, before the rubber sheet is wound around an entire circumference of the outer circumferential surface of the rotary drum; and winding a remaining part in the width direction of the rubber sheet stuck on the outer surface of the bead core while sequentially sticking the remaining part inthe width direction along the outer surface of the bead core from the part in the width direction toward an end in the width direction, wherein in the step of winding the rubber sheet around the outer surface of the bead core, 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 towardthe 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.