To provide a wheel having improved welding part strength in a semi-full design steel wheel capable of assuring a strength of a welding part between a rim and a disk flange part irrespective of arranging a water drain part.

A wheel 10 having an improved strength at its welding part is a semi-full design steel wheel. An axial end part 17 of a disk flange part 14 is formed to be continuous in a circumferential direction and at the same time a water drain hole 16 is formed at a part axially spaced apart from the axial end part 17 of the disk flange part 14. Both a disk 11 and a rim 12 are connected at the axial end part 17 of the disk flange part 14 by a full circumferential welding 21 having no starting or terminal end.