To provide a footwear capable of exhibiting a same appearance as an ordinary footwear and usable for a long time without impairing wear feeling while contributing to health promotion such as for curing bowlegs.

In a footwear base body, much hard material is used for an outside part and much soft material is used for an inside part. Thus, the inside part is made soft while the thickness is same as the outside part. The inside part is made softer than the outside part by providing a wide and deep slit shaped clearance in the inside part even if the material used is the same. The inside part is made softer than the outside part by providing a tunnel shaped clearance becoming wider and deeper toward inside of the footwear base body. Thus, the footwear usable for a long time capable of exhibiting derivative effects such as foot bottom massage without impairing the wear feeling can be produced.