A diffuser-type endplate propeller, configured to drive a hull and comprising: a propeller hub, having an axis of rotation of the diffuser-type endplate propeller and connected to a transmission shaft of the hull; and a plurality of blades, respectively having a blade-body and an endplate, wherein each of the blade-bodies is connected to the propeller hub and extends outward from the propeller hub to the corresponding endplate, wherein the propeller hub and the blades are meant to be located forward of a stern of the hull and each of the endplates bends from the corresponding blade-body to extend towards the stern of the hull, each of the endplates has a leading edge and a trailing edge, wherein a cylindrical surface is imaginarily formed by the leading edges while the diffuser-type endplate propeller is rotated about the axis, wherein each of the endplates has a first tangent plane at the leading edge thereof, the cylindrical surface has a second tangent plane at the leading edge, and wherein, while viewing from a high-pressure side of the diffuser-type endplate propeller, the diffuser-type endplate propeller rotates clockwise to drive the hull for proceeding towards a sailing direction, and an included angle (α) between the first tangent plane and the second tangent plane is a negative angle measured from the second tangent plane to the first tangent plane, wherein the included angle (α) is greater than or equal to -1° and smaller than 0°, wherein the leading edge keeps a first distance from the axis of the propeller hub, the trailing edge keeps a second distance from the axis of the propeller hub, characterised in that the first distance is equal to the second distance; and wherein each of the endplates comprises a first portion and a second portion, the leading edge is located at the first portion and the trailing edge is located at the second portion, and a curvature of the first portion is greater than a curvature of the second portion, the curvatures being measured on the chord of the endplate. a propeller hub, having an axis of rotation of the diffuser-type endplate propeller and connected to a transmission shaft of the hull; and a plurality of blades, respectively having a blade-body and an endplate, wherein each of the blade-bodies is connected to the propeller hub and extends outward from the propeller hub to the corresponding endplate, wherein the propeller hub and the blades are meant to be located forward of a stern of the hull and each of the endplates bends from the corresponding blade-body to extend towards the stern of the hull, each of the endplates has a leading edge and a trailing edge, wherein a cylindrical surface is imaginarily formed by the leading edges while the diffuser-type endplate propeller is rotated about the axis, wherein each of the endplates has a first tangent plane at the leading edge thereof, the cylindrical surface has a second tangent plane at the leading edge, and wherein, while viewing from a high-pressure side of the diffuser-type endplate propeller, the diffuser-type endplate propeller rotates clockwise to drive the hull for proceeding towards a sailing direction, and an included angle (α) between the first tangent plane and the second tangent plane is a negative angle measured from the second tangent plane to the first tangent plane, wherein the included angle (α) is greater than or equal to -1° and smaller than 0°, wherein the leading edge keeps a first distance from the axis of the propeller hub, the trailing edge keeps a second distance from the axis of the propeller hub, characterised in that the first distance is equal to the second distance; and wherein each of the endplates comprises a first portion and a second portion, the leading edge is located at the first portion and the trailing edge is located at the second portion, and a curvature of the first portion is greater than a curvature of the second portion, the curvatures being measured on the chord of the endplate.