Artificial leather and preparation method thereof

Provided is an artificial leather which has a dense napped leather-like outer surface, a soft texture, and excellent wear resistance. The present invention relates to a fluff-style artificial leather and a method for producing the same, the fluff-style artificial leather comprising: a complex sheet having a structure comprising two or more layers of a fiber layer (A) on the front surface side of the fluff-style artificial leather and a loose fabric contacting the fiber layer (A), and a polymer elastomer filled in the complex sheet; the average diameter of the fibers constituting the fiber layer (A) is 2.0 [mu] m or more and 7.0 [mu] m or less, and when the porosity is measured in the thickness direction, the minimum porosity of the fiber layer (A) is [epsilon] Amin (%), the minimum porosity of the loose coarse cloth is [epsilon] Smin (%), and the maximum porosity from the position of the [epsilon] Amin (%) to the position of the [epsilon] Smin (%) is [epsilon] A-Smax (%), the average diameter of the fibers co