To obtain an indoor footwear which is more excellent by giving to an outer bottom a bending property to fully follow the bending of a foot with an indoor life without damaging external appearance and a feeling to wear.

An outer bottom 3 of an indoor footwear 1 has an outer bottom center 31, the under surface of the outer bottom center 31, and an outer bottom skin layer 32 which covers the surrounding portions of the under, surrounding, and upper surfaces of the outer bottom center 31 and is connected to the outer bottom center 31. In the outer bottom center 31, a slit 311 for bending is formed so as to approximately fit to the first to fifth metatarsal bone heads F1 to F5. In the outer bottom skin layer 32, a hole 321 having a size to contain the slit 311 is formed. On the hole edge portion of the upper surface of the outer bottom skin layer 32, the surrounding portion of a hole covering member 33 comprising an elastic material is sewn. Between the hole covering member 33 and the outer bottom center 31, a cushion member 34 having thickness for the under surface of the hole covering member 33 to project onto the lower part than the under surface of the outer bottom skin layer 32 is made to lie.