An axial flow turbine of radial-inflow type for recovering power from energy of working fluid, comprising: a rotation shaft extending in an axial direction of the axial flow turbine; a turbine wheel including a plurality of turbine blades each extending from a blade root to a blade tip outwardly in a radial direction of the axial flow turbine, the turbine wheel being configured to rotate together with the rotation shaft; and a housing including a scroll part for swirling the working fluid flowing into the housing along a circumferential direction of the rotation shaft and a bend part for changing a flow direction of the working fluid flowing inwardly in the radial direction from the scroll part into a direction along the axial direction to direct a flow of the working fluid to the turbine blades, wherein the bend part includes a tip-side inner wall surface of a bend shape at least in a region at an upstream side, in the axial direction, of a portion of a leading edge of the turbine blades, the portion being adjacent to a hub, and characterized in that the bend shape of the tip-side inner wall surface along the axial direction has a minimum curvature radius (R min) at a position X z between an upstream position in the axial direction represented by X upst = X 0 - 0.5W and a downstream position in the axial direction represented by X downst = X 0 + 0.5W, where a position in the axial direction of a starting point of the bend shape is X = 0, a position in the axial direction of the leading edge at the blade tip is X = X 0, and W is a width along the axial direction of the turbine blade at the blade tip, and a curvature radius at the upstream side, in the axial direction, of the position X z, the curvature radius being greater than the minimum curvature radius (R min). a rotation shaft extending in an axial direction of the axial flow turbine; a turbine wheel including a plurality of turbine blades each extending from a blade root to a blade tip outwardly in a radial direction of the axial flow turbine, the turbine wheel being configured to rotate together with the rotation shaft; and a housing including a scroll part for swirling the working fluid flowing into the housing along a circumferential direction of the rotation shaft and a bend part for changing a flow direction of the working fluid flowing inwardly in the radial direction from the scroll part into a direction along the axial direction to direct a flow of the working fluid to the turbine blades, wherein the bend part includes a tip-side inner wall surface of a bend shape at least in a region at an upstream side, in the axial direction, of a portion of a leading edge of the turbine blades, the portion being adjacent to a hub, and characterized in that the bend shape of the tip-side inner wall surface along the axial direction has a minimum curvature radius (R min) at a position X z between an upstream position in the axial direction represented by X upst = X 0 - 0.5W and a downstream position in the axial direction represented by X downst = X 0 + 0.5W, where a position in the axial direction of a starting point of the bend shape is X = 0, a position in the axial direction of the leading edge at the blade tip is X = X 0, and W is a width along the axial direction of the turbine blade at the blade tip, and a curvature radius at the upstream side, in the axial direction, of the position X z, the curvature radius being greater than the minimum curvature radius (R min). a minimum curvature radius (R min) at a position X z between an upstream position in the axial direction represented by X upst = X 0 - 0.5W and a downstream position in the axial direction represented by X downst = X 0 + 0.5W, where a position in the axial direction of a starting point of the bend shape is X = 0, a position in the axial direction of the leading edge at the blade tip is X = X 0, and W is a width along the axial direction of the turbine blade at the blade tip, and a curvature radius at the upstream side, in the axial direction, of the position X z, the curvature radius being greater than the minimum curvature radius (R min).